Just in case someone will have the same question. It is ok. Here are the factory specs:

 

The higher the number, the higher the fuel flow, the richer the air/fuel mixture is, THE COLDER the cylinder operating temperature will be. They are of different size because the MAG cylinder (right) is hit by cold air first, the PTO cylinder (left) is cooled by the warmed up air coming from the MAG cylinder. That's crappy fan cooled twin engine for you, and this particular one is the worst of the worst.
I managed to equalize cooling between both cylinders, and both sides of each cylinder as well, through extensive work. So my carbs jetting are identical now. The cylinder heads cooling, however, are a near impossible challenge to undertake because of the 45° angle of the fins.

 

The main jet has nothing to do with starting one is richer than the other the Richest jet probably goes on the PTO side because of the heat from the clutch starting issues have to do with the choke plunger or the pilot jet

 

Those older 380s and 550s were made to run on regular gas because they need to make some heat if you're not running regular gas that's another issue because it will be too rich

 

Too rich? Type of gas makes no difference on rich/lean.

I do find it interesting that the needle clip position is different on each. Had not seen that before.

I've seen the jet sizes different on liquid cooled sleds as well. It is rare, and typically it is the for same reason, the fluid is flowing from left to right (PTO to MAG) and one side would run a little hotter than the other.