That's an interesting question, and I'd love to see a comparison, but I'd suggest they are very different animals.
In my experience, there's a whole workflow element behind the results that will really determine the winner... the theoretical limit of resolution of the Ektar at 6x9 cm is probably higher than the KP's 24 Mp (even when it's been cleaned up with pixel-shift), but a lot there depends on the scanner you use and all that part of it. And how you shoot (what if you need ISO 6400? Sorry, Fuji... you just got creamed).
I normally use a fairly low resolution scan for my medium format film work, since I'm after "the look", not maximum resolution for big prints.
If it's just a matter of resolution, the K1 has more than the KP... and there are options in other brands that have more than that...
But there's something about medium format... if that's what you're after, it may not matter how much resolution you have on the digital side...
What I have noticed is that most of the film shooters here still do a good deal of digital (there are some big exceptions)... so "or" may not be the best approach...
Sorry that doesn't really help...
-Eric