Apples and Oranges.
I like aspect of both, but I prefer 40k because of the skirmish style as it involves more unique models compared to the rank and file regiment models.
Both awesome games.
Dark Angels 1750 win/loss Record
Win - 23 (Belial helped wreck Ryan's puny Eldar)
Loss - 13 (Brice's Necrons wiped me)
Draw - 2 (The 13th hold out in alpha take and hold)