I have a 79 E'rude XP150 that runs great and a friend of mine has an 88 Johnson GT 200 that also is in good condition. He wants to trade motors b/c the 200 is too much motor for his boat. My question is two fold: Which of these two tends to be a better motor, and what kind of fuel consumption difference would I see typically? Should I take him up on this or keep my 150?