I’ve had a few of relevance, though I don’t use any of them for running! All experiences are based on everyday walking.
– Merrell Trail Glove (1st version). I’ve had 2 pairs of these and they’re very comfortable, the name “glove” is apt. I’ve worn through the rubber on the heel on both pairs fairly quickly though (might be related to how often I wear them). Very lightweight. Looks wise they’re my favourite of the bunch. Generally the soles offer decent protection, but trails with particularly sharp rocks can cause some mild discomfort (presumably this even worse if you’re running in them). I’ll buy again if I come across some for <£50.
– Merrell Bare Access Trail GTX. Haven’t worn these as much, but they have a much grippier sole than above and offer a lot more protection. Because they’re thicker they don’t mould to your feet, so aren’t as comfortable and feel a bit “flat” and rigid. Decent for hiking. The heaviest of the ones I’m listing here.
– Vivobarefoot Stealth II. Very wide, and they’re comfortable, but not as hugging as the Trail Glove. The sole feels thinner, and you can feel the concrete more easily. The feel like they have the least drop of the lot, though I’m not sure if that’s correct. You can remove the insoles to save weight, but even when doing so they’re still heavier than the Trail Gloves
– Haglofs LIM Low. My new favourite. These are the lightest of the bunch and it’s impressive how comfortable they are given those compromises. The soles are thick and “cushioned” so they don’t give you the barefoot feel if that’s what you’re after, but that does mean they’re probably the most comfortable of the lot. Haven’t had them long enough to tell if how durable they are.