Ignoring the names and marketing descriptions for a minute, what you're looking at are three cymbals with different weights.
Stage Crash: medium
Xplosion: medium-thin
Evolution: thin
This factor, more than anything else, will determine how loud it is, how much sustain it has, its tonal character, and how hard you need to hit it.
The Evolution will max out with a medium force hit, but with a lot of nuance below that. It's asymmetrical hammering, while smoothing out the tone, also robs it of some of its volume potential.
At the other end, the Stage Crash is pretty heavy and stiff under the stick, so it won't work as well as the Evo for lower to mid volume stuff, and will tend to sound a little harsh without a band behind it. But it will definitely cut through.
The Xplosion sits right in the middle and does both loud and quiet pretty well. IMO, the name of this cymbal is misleading since it evokes something more aggressive than it really is, and is a lot mellower than the Stage Crash. I think the Xplosions are gorgeous cymbals that are among the most versatile Sabian makes.
But for me, I'm not too big on smaller cymbals like the 16" because they tend to sound too much like large splashes, so despite my general preference for Xplosions (and medium-thins in general), if it had to be a 16", I'd go with the Stage Crash and always hit it hard.