Personally I'd go with the G6R because it is smoother and quieter. The ego is more resilient and is easier to program. With the G6R make sure to buy dow55 and a pressure tester and you'll be good to go.
I would get the G6R. Best poppit available. Very smooth and crazy efficient. The only edge the Ego has is slightly better CS and much better packaging. Haha you have to love the no frills packaging that Bob is known for.