Possible to upgrade to Ultimate from base+DLCs?

I bought the standard control game and season pass for the Xbox one back when it came out and loved it. From what I understood, the ultimate edition was just the base game with dlc so no reason to buy again. But as I'm ready for a replay on my series x ahead of the sequal I found out that they added the Kojima dlc to it as well.

So is there any other difference that I may be missing out on? Is there a way to upgrade to get that one dlc? Should I just wait for the next sale?