I have had extensive experience with the W/P 7s and the original Salons in my own system. So my comments are only relevant to the extent you believe the W/P 8s and the Salon 2s have adhered to the "house sound" of the immediately preceding models. (I don't personally know whether either of the new models has made a dramatic change in the overall personality of the speakers.)
That being said, I agree with some of the comments above that the W/Ps offer a more exciting, dynamic sound with faster bass. The W/Ps also soundstage incredibly well. The soundstage was impressively wider and taller than the soundstage of the Salons. (By comparison, the Salons offered a bit more soundtage depth.)
Nonetheless, I preferred the sound of the Salons in my system by a significant margin. In my system, the W/Ps tended to exhibit an electronic edge in the playback of recordings featuring acoustic instruments, especially classical music and the reproduction of violins. On the other hand, the Salons present the timbre of acoustic instruments with startling accuracy and have a natural, relaxed presentation that is more in keeping with the sound of acoustic instruments in a live venue.
I think that your preference between these two speakers will come down to the type of music you listen to and your personal preference/priorities. If you prize timbral accuracy and tonal balance and you listen primarily to acoustic music, I think you will gravitate toward the Salons. On the other hand, if you prioritize dynamics, quick bass response and soundstaging, you will probably be drawn to the Wilsons.
I hesitated to post here given that my experience relates to the preceding model for both of these speakers, but I went ahead and did so recognizing that these comments might not have continuing relevance to the extent the current models have made a dramatic departure from the sound of the preceding generation. However, given that successive generations of products often stay in the same general "school" or style and given that I had the unique ability to live with both of these older generation speakers in my own system for an extended period, I thought it made sense to go ahead and post for what it's worth.