That is a huge, broad question. Stilettos have a british (marshall type sound) Everyone knows what Rectifiers sound like and a Rectoverb is just a Solo 50 with Reverb. The F 50 sounds like, well, an F 50....not sure how to describe that one cause I have only used the model a few times. Kinda Fendery but beefier.
You really would be doing yourself a favor by hitting a dealer and playing some amps. If you dont live near one plan a roadtrip or something and include a Mesa dealer on that trip.