I've searched around, but I still would like an elaborate review on the difference in taste between these two base malts. Only interested in North American varieties, also.

I'm not sure what "grainy" tasting means, either. Is that generally looked on as good or bad? I've read Pilsner is more "grainy" tasting, is this true?

Which one is more malty?

Which one is more "clean" tasting?

Can I substitute Pilsner for APA, Blonde, and American Wheat beers?

I get away with 20 minute AG boils with 2 Row. No DMS, full hop utilization (you simply boil hops for 2-3 minutes separately in a pint of water, then dump into wort after hot break). So, will I not be able to get away with boiling Pilsner for only 20 minutes because of the DMS issues? Like I said, no DMS with 20 minute 2 Row boils. Awesome beer, too!