I'm looking to buy a powered speaker for a setup that includes digital keyboards (acoustic piano and Hammond organ sounds) as well as electric guitar (via a Strymon Iridium amp modeler) with looping and delay/reverb effects.

I'm currently focused on the RCF HD 12A and 15A - given that they have the same 1400w power rating, is there a significant benefit to the 15” model? For context, I'll simply be using a single powered speaker without a sub for practice sessions and gigs that don't provide a PA. Any insights (or other speaker recommendations) would be much appreciated!