One benefit of the vore scenario is the sensory experience. (Incoherent rambling ahead)
For prey:
There’s touch: very wet and silky. It may be a slipping hazard if you try stand upright (adds to the whole experience IMO). There’s of course visual which is likely either deprivation, glow-y stuff, texture patterns etcetera. Deprivation is cool as it’s a lot more calming then a glowing maw, stomach, fluids etc. Glowing is neat too, but it makes me act like a moth (I will try to go in without realising that I’m even doing that), and it’s pretty. audio wise a cacophony of sounds: teeth clanking together, tummy rumblings and others.
Preds:
There’s not much other then really taste if you’re excluding chewing textures (hard vore). I’m not a biggie on hard vore myself, so I’m a bit clueless on the other sensory benefits that preds have.