Is there a difference between the Legends and Exquisites as far as stock and feel go?
The Legends (assuming we're talking V2s here) and the Exquisites are definitely different with in terms of their stock/feel.
With regards to which are "better"... I'd say that's down to individual preference and what sort of card work the person does. I initially preferred the Exquisites, but over the past 3 months, I've taken more of a liking to the Legends.
From what I remember, the Exquisites felt very very slightly thinner than the V2 Legends, and they were slightly more flexible. As well as being stiffer, the Legends have a slicker coating (I've heard some say they feel more "oily"), and so they fan slightly easier. Legends tend to last longer also.
My guess would be that most magicians and performers would prefer the Exquisites, where as the Legends will take most people a little more time getting used to (if they've been using only USPCC cards till then) and will probably be a better choice for playing poker with.