I've been wondering about this and need to do some side by sides.
Apples to apples, soft hand/softee/fashion base plastisol to wb, wb wins by miles. The soft hand plastisols are horrible fibrilators, especially on ringspun. The ink just sinks right down past all the little fibers, allowing them to break free after a wash or two.
But if hand is not an issue, which is more durable....that's tougher. If you bridge the print completely, achieve complete matt down of the fibers, cure properly and use a good ink you should wind up with a somewhat soft, rubbery plastisol print that will take quite a few years to crack and will look the way it did from day one until it does finally degrade.
The achilles heel I'm seeing with WB/DC is that, as you go through washings and wearings, it dulls in accord with the shirt fabric itself whereas plastisol never really dulls, it just loses it's elasticity over time. They both can take a hit from UV but that's a pigment thing.
We print ring spun all day long here so I think about this often.