I can't bear Digimon. I remember that younger, each time I heard the opening I turned down the sound level, it was really bad comparate to the epic Pokémon Opening.
And, moreover, I think Digimon are ugly, the anime is barely passable.
On the other hand, Pokémon is just... Waw ! Beautiful creatures, awesome anime (ok, not these days but I remember I was completely crazy about the first season), exceedingly great games...
Pokémon has nothing to envy to Digimon, seriously.