I also have a MAK 2 Star with the new FZ. I also upgraded my Pellet Boss controller. Both are significant upgrades to the MAK's performance - startup time is faster, less pellet consumption, hotter temps (choice of pellets plays a significant role in the upper temp production!). I have MAK's grill grates as well. You will get the full range - excellent smoke through very hot searing capabilities.
Full disclosure: I also have a Weber Summit gasser with GrillGrates, which I've had since 2008. The gasser is still my "go to" for grilling, particularly for steaks, dogs, fajitas, etc. Since it is LP, I do not have the "hassle" of setting up the charcoal, nor the clean-up, so most of those cooks are 30 minutes start to finish.
So, given what you highlighted as your decision "drivers" in your first post on this, I think the upgrade is clearly a great path. You have the MAK 1 Star already, so it is a great choice IMHO.