Uberrime Aptus and/or the Night King to add to the collection?

So I bought some toys and now I’m pretty sure I have a collection that will be my new hobby for a while. So I wrote a list of recent acquisitions but couldn’t decide what to put in first. Next on my list is Aptus or Night King by Uberrime. I’ve been going back and forth, so please let me know which one you’ll get and why (what color bonus). I know they have a lot of similarities and I think I will eventually buy both, but which one first? ? ?

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