Sounds like the 9000 has significantly less power than the 9010. I'm in the market for a used, large displacement saw and am leaning towards Dolmar. Is the 7900 a better bet for the money than the 9000? Haven't seen any 9010s for sale.
9000 doesn't have "significantly" less, but it does have less.
Both are great saws and have nothing to be ashamed of in the 90cc class.
The 7900 is just a faster saw where the 9000 and 9010 get their power from more torque.
Depends solely on your needs and your finances.
If I could have only one, it would be the 7900.
If you are looking for a new 9010, you'd better hurry.
There aren't many left in the pipeline and they are going fast.
Mike