Holzfforma G660 is a gas guzzler?

I got to test my brand new G660 yesterday. I put 4 % (25:1) fuel blend in the tank and it started on the 8th pull. Runs like a charm and is easy to start. But is it really a super fuel hungry saw?? Seems like i can run for a shorter period with one tank than my MS250 with 18" bar. Ms250 has half the engine size but also half the size of gas tank.

The G660 is making much(?) Exhaust smoke (see second picture). Compared again to MS250 I can almost never see the exhaust. On G660 it is making a constant but healthy looking smoke.

Is this beast a gas guzzler or am i missing something?