That's interesting as I have a bracket along the edge of my 10Gb NIC which cuts off how tall of a cooler I can use but there's still 12-13mm of space. I didn't think anything overlapped on the slot side of video cards, but that makes sense.
Yeah it was quite annoying
I replaced the nvme Asus b550 tuf WiFi the second slot is in-between 2 PCI e slots and the tabs are ungodly big that if you use a nvme that's to wide or spills over the bracket you'll get your GPU stuck cause the tab can't compress down.
That and the heatsink on the GPU tends to be so close to motherboard.
I had to very painfully bend fins back on a nvme and then push down the latch with a screw driver. With ungodly force just to get it to release .
Thankfully the MC was much more smaller.
Benefits of MC pro are as follows
Still compact for for CPU cooler slot at the top as I had a thermal right cooler for nvme that was tall but the find width clashed with back of GPU and my CPU cooler tower.
Other good points comes with everything you need including the screw driver. Which comes with both models.
Also I found with controller chips on nvme the cooler on thermal right for example would move a bit unstable and I had to use thicker pads to get it to clamp properly even though it says for both nvme type and using alot of force to hold it down while screwing it in still felt looser then the MC.
The install on the MC didn't have this issue I think because the threads on the heatsink were better and had less play once it's on its clamped.