I have one of each. I prefer the 59 to the SRV but only slightly so. My two necks are about as different as possible.
Strat neck: 59 Roundback, mahogany w/Ebony, MOP dots, Graph Tech tusq xl nut, schaller lockers, gloss finish.VI
VIP Warmoth neck: SRV, wenge w/bloodwood, black dots, Floyd Rose nut, grover tuners, no finish
I chose the SRV because it was thicker than the Wolfgang overall. I honestly can't complain about either neck. I don't explicitly have a favourite guitar, but I pick up the strat more often. I've had that one significantly longer.
Maybe it's the profile, maybe it's the wood/finish, maybe it's the body to which it's connected. I can't say.