My experience also suggests that you will have different results with different wheels. Sun rims deal better with kevlar, IME, than wire bead. (The DS-2 rim I had in 2005 wouldn't even TAKE a wire bead!) I attribute that to the shallower rim bed in the Sun rims.

When you're doing a tubeless conversion, wire beads hold their shape a bit better at first; I've taken to putting my kevlar-beaded tires on spare hoops and letting them 'settle'.