It is certainly a matter of personal preference.
I originally owned T1 and have had the opportunity to to play Tyros 2, 4 and 5. I wouldn’t swap my T3 because I like it’s overall sound compared to the T4 and T5. Also to me, the strings are sweeter.
However, if it became necessary to upgrade, I would prefer another T3 or the T5 and not Genos, as I would find all the buttons/controls on the Genos much more difficult to operate as I don’t have any fingers on my left arm and play single finger chords with my stump.
Best wishes Leo in the choice you make. I’m sure you’ll continue to enjoy any keyboard you own.
Linda K