That’s not what I see from the PCB layouts posted.
Just one linear FET driver, not two, no separate connections for balancing two different colour temperature LED banks, and the layout is seriously messed up around the FET on the posted layouts (will never work). I’ve tried to reverse engineer it but the layout makes no sense, it’s all over the place and shorts itself out at several points around the FET.
Agreed, it does look like a rip-off of led4power’s design. But it makes no provision for the lowest modes, firefly, moonlight etc. which led4power does by simply driving them directly from a separate MCU pin through a high value series resistor, PWMed as necessary.
To try to do that all using just a big FET in linear mode with a (very basic, none-differential) Op-Amp for feedback is difficult enough to cover just say 8 bits=255 levels for ramping = 7 useful discrete levels.
If intending to PWM the thing for lowest modes, then e.g. the Op-Amp had better be tuned carefully with the FET and LED characteristics to have a hope of working predictably. Op-Amp selection will be critical. The characteristics of the FET and the LEDs may dominate anything beyond obtrusive visual PWM.
As will the selection for minimal standby power in e.g. E-switch applications. Micropower/minimal offset voltage/high differential gain/gain-bandwidth product, temperature stability etc. etc.
Presumably this has all been bread-boarded successfully so I needn’t worry.