I like the openness of a trio. Each guy has a lot of space to work with, and there are so many ways to interact. With a quartet or larger, you almost have to have more structure to things. Two guitars, it's pretty much a given that there are things that have to be worked out. Guitar and keyboards, you probably still have some space but things can get crowded. With a lead instrument or vocalist, they'll tend to take the spotlight when they're there, and the rest of the time things feel empty without them. This is all generally speaking, of course.
But with just three guys, all instrumental, so much more feels like it's riding on the virtuosity of the players and their command of their space within the group. You put top-shelf players together in a band, I want to hear what they can do.
Black Light Syndrome is different from the first album in ways that I'm just now figuring out. Maybe I'm fortunate to have discovered it first, since I liked it a lot and was able to get into the first album. It might not have worked out the same the other way around.