Gretsch, it's not quite correct the price ot the Jolida 302b to the Prologue II. The Prologue One which uses EL34 tubes is a much better comparison. I can't say much about the sound but, The Prologue has a slightly better finish and built quality. The Jolida is nicely upgradeable by many companies (Response, Partsconnexion, Verastarr etc. ).
I loved my Jolida - worked well for me with many different monitor speakers. For big, standspeakers I might consider going with a KT88 tube amp though for the tighter bass.
What speakers are you using?
Good luck,
Rene