Different people will have a different tolerance for vibration and ride comfort.

I have a pretty stiff road bike so I'm used to feeling plenty of road vibration.

When I hop on my rigid hybrid, the ride is super comfy in comparison, even w/o a suspension fork.

You should buy the bike that makes you want to ride more. It sounds like the 7500 (or any hybrid with a front shock) will make riding more pleasurable for you.

The only thing you really sacrifice is a bit of speed (via a loss of efficiency) but this will be minor and if you're not out to race, who cares? The bike might be heavier to load/unload too by a few pounds. Again, who cares?.

You can buy whatever brand and width tire that suits your needs or preference (as long as it fits).

I have found that tires very noticeably affect ride comfort. I have 28c tires that roll fast and smooth for my hybrid. I also have 40c tires I use for trail riding and are actually good enough (but a little slower) for path riding.