One thing that's often overlooked and not all that relevant to some is size and space. There's not that many spacious tent offerings in the budget side of things, or if there are they are heavy as sin. You put together a proper tunnel tent from PU coated high denier polyester and the end result can weight somewhere north of 5-6 kg (11-13lbs).

Our first tent was a three person dome that cost around 250 € at the time. Night indestructible but really small for me and our stuff. I'm 6'5" and so almost all dome tents are way too small for me. Because even if the inner tent is say, 225cm long, you need to factor in that the front and back walls of a dome tent are inclined which eats a lot of that length. Then factor in the added height of the sleeping pad and the length shrinks further. This resulted in me brushing the tent wall with my toes/head even with the largest hiking dome tent I could find and test which always left the foot end of my sleeping bag soaked wet even on relatively dry nights.

So wanting to get away from wet feet and a constantly wet sleeping bag we bought a 700 € tunnel tent which had a 225cm inner tent length BUT one of the walls is straight! No incline means I have oodles more space. Haven't noticed wet feet for a long time now. The other positive side tunnel tents have is the large anteroom area which works well for storing gear out of the rain as well as some extra space to move around, change clothes etc. Some crazy finns / scandinavians even cook in their tents but I honestly haven't dared. I respect fire too much to risk it going badly in a plastic tent.
As an added bonus the tent is made of low denier silicon coated polyester meaning that while it's a bit heavier than an equivalent nylon tent, it does not degrade with UV-rays. It still weighs less than our original cheap dome.

Cheap tents won’t survive the zombie thread apocalypse.

Last year I had to purchase an extra tent for occasional use when a friend or family member would join us on tour. I picked up a Kelty Salida 2 for $100. Weighs in right at 4 lbs for a touch over 30 sq. ft of floor space and seems well built. The Nemo Dagger 2 tent that I'm currently using is definitely not 3-4X times more tent than the Kelty but it was 3X the cost.

1. Weight - the $200 will be lighter and pack into a smaller size
2 Quality of poles - easily rectifiable with a $15 set to poles at Amazon or store

That's about it, with a $200 tent, you are paying $130 markup for the name on the tent. You can buy a high quality tent like a 3F tent for 1/3rd the price of a name brand with the same exact construction.

Both tents will keep you dry. I did my last tour using an Ozark Trails tent, never had a problem.

If you meet someone out touring, an inexpensive tent will be a huge turn off. She’ll think you are a cheap bastard.

You stay dry in the expensive one!

There is some truth to the "staying dry" point.

A lot of it comes down to design and materials.

A cheap dome tent with a fly over the top vent area only, single wall the rest of the way down, is not going to keep you dry. There may be a better quality dome tent with better quality material than what you will find at Walmart, but it will cost you.

Then you get in to the differences between 3 season and 4 season tents. Most "3 season" tents, in my book, are "1 season" tents - warm weather only - and are nothing more than a bug net "tent" covered by a rain fly, if you so choose to put it on and not sleep directly under the stars. All that mesh doesn't do much to insulate when you are in cooler weather.

4 season tents have no mesh except for window/vent openings. These are true double-wall tents where you have a solid tent and a weatherproof rain fly on the outside.

The main tent I have is a Mountain Hardwear Hammerhead 2 that is about 10 years old. It is a very unique tent in that it is a true double wall tent - if you zip in all the paneling. It was marketed as a 3 season tent, but with the zip in panels it is as good as a 4 season tent in the cold (and its been in the appalachians with temps around 0deg F). The drawback to this style tent is that the fabric plus the mesh, for those double areas, does add weight. No two ways about it. The protection and flexibility, though, is a huge gain - a gain not very common in the 3 season tent class.

When you look at "design" - you can look at name brands vs lesser "quality" brands (big box store, general consumer type - like the kind you find in the camping isle at the general store) and gather that a particular design may be similar to a name-brand, but 1/3 the cost. However, material and durability is a factor as well. Higher quality materials are probably going to keep you dry.

The difference? Staying dry. That and at least 2 lbs lighter.

Does anyone have any experience with Vango tents?

I'm afraid Vango has gone toward mass-produced, lower-end models in the last few years. Nothing really wrong with them (except for the ones with fiberglass poles) but certainly nothing exceptional. Terra Nova is a better choice if you like European brands. Hilleberg is also superb. The article here is a good primer for learning what to for and what to ask.

Yeah, it appears Vango currently produces a lot of backyard and festival tents. I found a Vango Hydra 200 with impressive specs but not enough reviews to reach any definitive conclusion. I’m in the market for a spring-fall-early winter tent for stealth camping and need a 3-4 pole, 2 person tent that will handle high wind and rain. The Hilleberg Nammatj 2 checks all my boxes except cost. The Terra Nova Trisar 2 architecture is practically the same as the Hydra. I understand lighter material comes at a cost premium and rationalize I won’t be backpacking with the tent so the extra weight is acceptable. The 3 tent weights I mentioned are very close with the Trisar coming in 10 ounces lighter. If the Nammatj wins, I’ll have to go with the GT variant or have buyers remorse. Decisions.