Just posted this in another thread, but figured it would be of more interest here. I pulled the trigger on the WL Deluxe, to compare against the WL v1, GR2, and JoshWah that are currently in my possession. Ultimately, I'm going to keep 2 filters on my board, so some decisions will need to be made in the next few weeks. The Deluxe arrived yesterday, and I spent a solid 3-4 hours toying around last night, so this is all just initial thoughts.
I expected a quick sale of the WL v1, assuming I was simply upgrading to the added expression FS, face-mounted boost knob, and external buffer/bypass switch with the deluxe. However, the filters do not sound identical side-by-side. I know the sensitivity is increased on the deluxe version, but the controls also cover different ranges. If you match the knobs, there is a clear difference in sound between the two. The filter itself seems to be voiced a bit higher on the deluxe, if that makes sense.
Overall, the deluxe sounds brighter and more resonant/liquidy on the top end. The v1, on the other hand, sweeps a little lower when the filter closes. With the same settings and the sensitivity dialed in on both, the V1 seems to maintain/emphasize the low end a bit more in the first position. I can achieve a little more murky, lower pass sound with the original. If both boxes had the same external features, I think I would go with the v1. So, this is going to be a lot of AB'ing over the next few weeks. What a terrible problem to have...