Time. Time during which you've had an emotional breakdown of some description. Cried, stamped your feet so hard they hurt, punched a wall, shouted. Time is the difference between MBT being successfully integrated into your psyche because the breakdown of your mentalization has been caused by BPD, and the endless pop-up scenario of MANY MENUS! HANDLE IT! which means your breakdown in mentalizing is caused by the Asperger's. Can you see what I mean here?
The good news is that once you've accessed the program (remember how frustrating it was when your mouse accidentally left the menu and the whole thing collapsed back to the start?! GAH!) it's easily run. But it hasn't replaced the original programming - that runs as soon as the event triggers your response - it is just another option for you to access.
You know, a real life HUD would be very handy. Can you imagine? Like the Terminator:
I gotta get me one of those.
So that's the difference between BPD and Asperger's for me as far as MBT goes.
As for the similarities...
Eish.
Asperger's is my personal Occam's Razor. It explains a lot. And by "a lot" I mean practically everything:
From walking up walls and pacing as a child to collecting ALL THE THINGS in different phases as a teen/adult. You should see my yarn stash. No, seriously. Pets in Warcraft (before they went all Pokémon on it), Pokémon (used to be able to name the original 101 easily); and the water thing - OHMIGOD I had no idea that was a recognised thing. Fecking hate the taste of the stuff and will only drink it if I absolutely must.
Welp, you're all up to date on me. Ta ra.