So you are only using Linux as a synth? Comparing of performance/used
resources becomes interesting, if you care about complete MIDI/HDD
recording productions, taking care if there is no MIDI jitter, if the
sound isn't muddy.
E.g. what kind of PADsynth interpolation do you use for your Yoshimi
instances?
IMO the kind of tests you're doing are meaningless, resp. you at least
need to provide more information about your setup.
Regards,
Ralf