Fox 2.0 vs 2.5 IFP

I'm looking at suspension options, and looks like Fox will be the way I go. I'm having a hard time figuring out what the real differences between the 2.0 and 2.5 coilovers are. Lots of "take your ride to the next level!" and "Step up your performance!" but nothing about the actual differences.

Is it just the increased heat dissipation from the larger body? Does that matter if washboards aren't a common thing?

It might not matter that much since it seems the Fox level 2 kit with the 2.5 from Headstrong is only $150 more expensive than buying separate with the 2.0. Just wondering if it is overkill. The aluminum bodys on the 2.0 is attractive since I live 2 blocks from the beach, and salt gets everywhere.

I'm kind of a slow and steady driver, my wife on the other hand likes to pretend she's in the Baja 500. With a completely loaded bed for a 2 week camping trip.

-Chris