VTOL: Different motor throttle

I decided to rebuild my plane and make a VTOL plane. But I ran into some problem.
I have 1 front and 2 rear engines. The front motor speed controller is different and has a different PWM.
Front engine - (1000-2100), rear engines - (1100-2000).
In stabilization mode, all my motors are given the same PWM. Can I apply percentage PWM to motors?
For example, 10% throttle - 1100 for the front motor and 1200 for the rear, but 100% - 2100 for the front and 2000 for the rear?
Or is recalibration the only solution?
Also, when armed, the front engine rotates at very low speeds at 0 throttle.

I will be grateful for any answer