Pretty sure seed speed and latency to the peer has a big part to play on what seed a peer picks from the swarm to download from when there are several options. In my experience Plasma won, Budgie a close second followed by Mate and Gnome. So all you can really say is people that have a good connection to you prefer Budgie. There are many other variables to consider.
I have no doubt Budgie is the most popular Solus edition but seed ratios are not a good indicator. We would sometimes compare the initial seeding for new Solus releases on IRC. While Budgie was clearly popular there would be significantly different rankings amongst seeds, for some Mate was winning.