I own both an Epix Pro and a FR965.
The metronome (and countdown timer during workouts) is totally wonky and inconsistent BPM when in use. The FR965 does not have this problem at all, and keeps consistent time during metronome beeps and workout countdowns.
I am using a Connect IQ Data Field (Stryd Zones) on both watched. Is the Epix Pro not capable of doing a data field and keeping time at the same time? Is it just underpowered? Or do I have a defective watch?
I would assume the Epix Pro has a better processor than the FR965... but AFAIK Garmin does not share any of this information.