I think it will behave very similar to the original 15ND930 but it has a 4" voice coil so it will handle more power thermally, which doesn't hurt. In responds to your PM, that's quite a powerful system you're working on.
I would be glad to receive your advice.
My friends and I have a small sound system:
2 Kind of G subs
+ 2 reflex cabs with RCF L15 554K as kick + tops.
We want to change our kick bins to cubo kick to get more crisp bass and a "chest feeling".
The question is how it will affect cubo kick parameters with adjustment of it to 53.6 cm width (same as subs)?
Changing the width to 53.6 cm lowers the output between 80 - 90 Hz somewhat, in exchange for a slightly higher crossover for the tops. Since chest feeling starts around 120 Hz anyway, it shouldn't matter much. The RCF L15 554K is a great kick driver regardless.