Hmm, seems like there's lots of conclusions to the original question:
Guess the 2.9 is bigger than a 2.3 and somehow makes more hp
Whipple waited an extra year and it looks like they improved a few things like fuel issues and IAT.
Those with the Eforce are very defensive of them. Maybe cause they have been driving theirs for more than a year.

(and love them)
No matter what you have, the people with the other ones are either idiots, nerds, moms, squares or illiterate.
Do you really think we're going to convince someone they spent $7,000 + and made a mistake? Let's hope not.
Both these put out a ton of hp and torque, let's hope our engines all hold up so we can enjoy them.