Firstly, your photos look SO good. Just amazing!
And secondly, that was EXACTLY my concern when I bought (still waiting for) Endgame Cap. I have the Mk VI diecast as well and as love it so much. It was my first and only Iron Man figure, and when it came out the Mk VII diecast hadn't been release. I probably would have gone for that one as I love how chunky it is and it's in my favourite parts of Avengers. BUT... I also love the Mk VI. The heavy metal physicality of the earlier suits just appeals to me so much, they look like something that could almost exist. And once I had the Mk VI it just blew me away and I knew I'd be happy with it being my only IM figure.
And then Endgame came out, and I ordered Endgame Cap. And started thinking "oh man, I'll probably want to put them together. They won't look right! I need Tony's Endgame suit! (don't know the number sorry lol). And then Thor too probably.
I actually asked people on Reddit I think what I should do and everyone told me to keep the Mk VI as it's really good. But I'm not sure. I don't want to get rid of it, but i do NOT want two IM figures lol. I don't have space (or money) for multiples. My collection isn't that big it's more props and stuff (see attached pic for one shelf in my studio)
But yeah... I know I'm going to wish I had the Mk 85 (just looked up the number lol)... but don't want to get rid of the Mk VI... but don't want both
First world problems. Your pics look so good though maybe I can just pretend that's how he looked