Hey peeps,
I've been using both throughout the years and I can definitely say there are pros and cons to each. What I especially like about Corona for 3ds Max is that there are no threading issues. I've brought this up to the developers of the C4D plugin and they've said they are working on it. Granted, they are working on it for more than a year. For a few months I thought it was just me who was running into issues although I'm probably one of the few who have extreme issues.
When I switched to 3ds Max it was a whole different experience. The interactivity is a lot more like what you get in Octane in C4D where the IPR updates flawlessly. For me personally, using 72 threads in Corona for C4D makes the thing unusable - quite literally.
That being said, a lot of users don't report any problems but I do wonder whether they now how its "supposed" to work in the first place.
I had a similar impression about people who work with V-Ray for C4D and have never used V-Ray for 3ds Max. Some people actually find the current IPR implementation (can't change anything but the materials or something like that) really good. Its actually so 2010 though -_- (Not meant as a knock on the devs, they were doing their best with what they had).
Luckily from what I'm hearing the GPU renderers that are in C4D appear to be better implemented than most of the 3ds Max ones (Exception being V-Ray and F-Storm).
I work as a consultant too so I kind of need to know both c4d and 3ds max. I can't tell you how helpful that was for my professional growth as you can really see where the drawbacks of each software are at.
For example, the C4D community barely knows about the "Edit Poly" in the modifier stack and how useful something like that can be when it comes to client revisions. Contrary, the 3ds Max community has no idea how much easier it is to just use something as basic as a non destructive cloner to drive an animation. Funny but if you are more of technical peep its really fun to get to know different software, including Modo and Maya :)
edit:
@Rhodesy
I wouldn't say that the VFB "performance" is a limitation of C4D. Other IPR renderers work awesomely even the ones that use the CPU (Indigo).
edit #2:
Oh and a quick tip for you two. Not sure if you are using it already but there is this neat script called CopyTo (
https://3dground.net/prod/copyto-2211507) that enables you to copy between 3ds Max instances / Different scenes without having to export anything. Its what C4D does natively but 3ds Max just doesn't.