Your data is fascinating, for me at least! The power curve is all but identical in shape, cycle duration and cycle frequency to what I see. Not really what I would have expected in two different installs with differently rated units. My design load is only 1500w at -3C external. Do you know yours?
Is this the “default” 65%PWM pump setting? Looks very close. Will be interested to see what dT on the DHW cycle is here with 1186l/hr.