Perhaps a bit of both! I think having the no FX stems is helpful - maybe some adjustments needed on my original choices. It was all stock plugins, and the track is many years old.
Sounds like a good idea, substituting Renoise devices with vsts is a tedious process. That’s why I try to only use VSTs. Then conversion will be much more easy. The plain Renoise sampler can be replaced with Redux though. Also I then use the modified version of the midi export tool, since it also exports automation to midi ccs, which you then can copy to the actual automation lane again in the other DAW.
Maybe keep the “coloration” fx though? Just removing reverb, delay, etc? I don’t have much experience with stem mixing…