Vans stores (if you have them near you) are starting to stock the Half Cab Cup. The mesh/fabric choice bends/sits weird when you have them on foot/hand. I say TTS. I tried them in a 12 and they fit somewhere between snug & too lose. Same size in Cab 4s also feels between snug & loose. The Cab 4 feel infinitely better than these Half Cab Cups :/
They feel fine, but could be better. I believe the Skate Classic Half Cabs feel more sturdy, yet flexible. This waffle cup sole has a sturdy heel feeling, but the forefoot feels noticeably flexy. It may even be thinner than the vulc Skate Cab counterpart. Classic waffle cup "issue" many of us have had where they feel less supportive than their Skate vulcs

Also, it's been so long since I've worn/tried on Vans vulcs. That popcush insole doesn't feel as comfortable to me like they did back in 2017-2020 when I wore a lot of Vans Pros. You could get these and swap an insole for a better fit tho? I'll let others who've done that with Vans Skate/Pro models chime in on that!