I can't stand the smell of peanut butter cups. I've never had Reese's Pieces, though. If they taste even a little like peanut butter, I don't like them either.
Cups are superior to pieces in appearance, taste, and texture. The pieces aren't bad, but there's nothing special about them... and I imagine they don't pair as nicely with ice cream.
JO
In my defense, I've never tried Reese's Pieces before. What do they taste like, for those that have tried them?