This is a poll I answered in 3 seconds and probably could have answered in 1 second if I could read faster.
I greatly prefer EB Cobalt flats compared to any flats I’ve tried which are;
TI Jazz Flats
Chromes
Fender
Labella 760FM & FL
Not on the list I’ve tried
LaBella Olinto flats
I’ve finally decided the reason I prefer EB Cobalt Flats to all others is that they generally sound like broken in rounds with pronounced high mids, and continue to sound the same for a very long time, but if you roll off the tone knob, they sound like traditional flats. Since my first set of EB Cobalt flats (about 5 years ago), I’ve used my tone control more than all previous playing years combined.
Feel like medium tension flats.
Sound like broken-in rounds.
Sound like traditional flats with tone rolled off.
That’s about it.