Well, I have both woofers here so I have had lots of time to play with each.
They both have the same motor, suspension, cone make, everything....only one is round and one is square.
if you plan on doing a sealed box, CVX all day. they sound a good bit better in sealed enclosures than L7's...and L7's aint no slouch in sealed boxes either to be honest.
in Ported, they both sound about the same to me, each pair of comp vx's i have is ran by a kx2500.1, so they get plenty of power.
really...it's a toss up. The CVX's are new (mainly why I chose these), more versatile I guess since they are round. But I just wanted to share with you because I want you to be confident in your buying decision. I know if someone didn't tell you their own hands on experiences with CVX's, then if you bought them you would always wonder...well what if? ya know?
so, if you need any suggestions, feel free to holla!