Wilson sound is slightly more incisive and has better micro detail. Dynamic, with excellent bass performance but no particular emphasis. Gershman are warmer and more forgiving with a bottom up sound and slight bass emphasis. This is my experience on numerous listening sessions with both. Wilsons at home (5 different models) and shows, Gershman probably about 6 times at different shows.
You cannot go wrong with either.
You cannot go wrong with either.