I've used a Unicomp "Spacesaver" for many years and have been very happy with it. Recently I've switched to a ten-key-less keyboard with blue Cherry switches in order to have more space on the desk, and I've got to say that I much prefer the snappy feel of Cherry switches.
I've always been bothered that Unicomp uses the term "Spacesaver" for their keyboard with less trim; traditionally, a Model M Spacesaver refers to a ten-key-less.
The big difference in the feel between buckling spring and MX blues is that buckling spring has a tactile drop where the force suddenly drops off right at the actuation point[1][2], where blues have a tactile bump where the force spikes up right before the actuation point[3][4]. I'm not sure what it's called, but the blues also have a temporary drop-off in pressure in the middle of the return stroke.
Which is better is a matter of personal preference. There's no substitute for actually trying a switch, but actual force/displacement graphs will do a much better job of telling you what a switch feels like than subjective words like "snappy" or "smooth" or "mushy". https://input.club/the-problem-with-mechanical-switch-review...
