Well right, don't rely on any one thing. But if you're going to buy a vest, ISTM that it makes sense to buy one that is like 10x more reflective than the other.
I'll try to check out an LED vest at some point but honestly the one I saw was very weak, and I don't expect much from them. They seem to me like something that demos well in the store or at home but on the road doesn't work worth a darn. If I get hold of one I'll wrap it around a human-diameter tree trunk or something along with the above vest, walk off a couple hundred feet, shine a flashlight that way and take a photo (or video if that shows the LED flash better).