We rode IP for a year or so then went to OOP. You do not specify whether you're OOP 90 degrs advanced from your stoker or 90 ********. We've tried both, and teh stoker can't handle it unless she's 90 degrees ********.
For her there's no comparing: OOP in this manner is far better. We're not even close when it comes to power output and she has a pretty bad knee. I think the OOP alleviates some of her resultant aches and pains. FOr me, I think we're probably faster IP but we're not racing anymore.