I too have recently bought the Alexia 2, and it is truly an amazing sounding speaker. Unfortunately, I have never had the Alexia 1 to compare the two. However, you can check out Jay's Audio Lab on You Tube. He has several videos, where he is testing WA Alexia 1 and 2, with various amp, preamp, cabling etc. The most interesting find for one of his best sound was with class D amps (Merrill Audio Element 118). Now I am very curious, and tempting purchase the pair.
https://www.youtube.com/watch?v=jiaa3wv6ifo&t=2558s
https://www.youtube.com/watch?v=jiaa3wv6ifo&t=2558s