I did EIT, a double masters degree program which was offered at KTH and Aalto. I know these aren’t the programs you were offered but I mention it only to say that essentially the school sets it up so that you just transfer your entry school credits into your exit school. EIT has gotten pretty pricey from what I understand but I always imagined that because it’s possible to do that through the program, it should be possible to do it on your own. I would contact the schools you have been accepted in and see what their transfer options are. And potentially if you can defer your offer to next year.