You will only gain by the change. C4D is not a rendering software, as some here may have led you to believe. MaxonForm was just a stripped down version of C4D, containing just its modeling capabilities (or at least most of them). So, C4D is everything you had in MaxonForm and much, much more.
If you do not want the 'advanced render' capabilities of C4D, but are just focused on modeling, then just obtain the base C4D package.
Cheers,
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sonoma 14.7.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB