Wilson better than Thiels?

I like both, but would choose Thiels.

Tony, to get the best from Thiels with tubes can be quite expensive. With Thiels, solid state is much more cost effective.

Vegasears, VTL 300's should be very nice indeed. Unless one listens to a very narrow range of music, in a small room, at low listening levels, puny SET's neeed not apply.
Sanji, true the Thiels need quality first, but, more of it will be more rewarding.

FWIW, I find the Wilson's to be more dynamic, but the Thiels more linear and coherent.

"casual vocals and light instrumental music"? I suggest you let the reader, or better yet the listener, decide for themsleves.