the leo's are super slim, built on the same sole as the reynolds 3,francis and ridgemont,they are thinner, but they do have the g2 gel in the heel which you can kinda feel, but if youre jumping down anything sizeable and kick your board out, youre pretty much fucked.
as for durability, get the all suede, the black/white ones are half canvas and ive seen kids blow through them in a week if not shoe gooed.
besides vans soletech is the only company who makes a decent flexible grippy vulk shoe that doesnt feel like some oversized boot.