Having the nightmare of mounting the one on the left, I believe this is the case. The mounting points onto the frame dont/cant change from LCI to LCII. But the way they attach has been *seriously* improved on the right hand unit. The ridiculous hardware mounts for mine dont look as bad on the updated one.

But, if the units are physically different in length or width at any point, I could understand the need for it on both. But seriously, the aero kit is a softer dress up kit for an edgy frame. Who in their right mind (this excepts crystal- and most of us- out of the gate).. who in their right mind need under ride on a cream puff?

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