Here's what I would suggest if you still have it available - tweak in your tone that you prefer actually using the RCF; removed from the Atomic. How/what/why you tweaked in your tone with the Atomic will not work with the RCF. Once you've dialed in your tone with the RCF... then switch back to the Atomic. It will expose the weaknesses of the Atomic pretty plainly. (My thoughts on that are detailed below).
What you are doing is akin to "'demo' love". Someone falls in love with the demo of a song they did to such an extent, that the actual final version sounds 'wrong'.
Now I could be wrong, and I have no problem with that - and I am not trying to sell you on the RCF (I don't know anyone at RCF and don't give a hoot about them; I do know Tom King and like him personally very much in fact) but what matters is accuracy.
I'd also concur that the upcoming (shortly upcoming) 5.0 firmware will do is deliver exactly what you are looking for and it's not far off. It's very likely that your taste and opinion are subject to change shortly.
Or not.
The Atomic's issue, IMHO, has been the (lack of) clean headroom and the bass response (it humps in the lower mids). unless your drummer plays a lot softer than most do, you need at least 2 Atomics to make it work. One RCF can do the job very very well IMHO.
Now if you are not in a hurry, there are rumblings of something coming from Atomic in the upcoming months that will set this entire discussion on it's ear.