GA-EP43-DS3L (P43 chipset) doesn't offer RAID or support for CrossFire. P5QPro also has explicit native support for 1600FSB/DDR2-1200 although the GA-EP43-DS3L hits them as well with minor tweaking. P5Q Pro has two more SATA, GA-EP43-DS3L has two more USB... from there the differences are mostly quibbles.
Did I mention the P5Q Pro isn't DayGlo?
Did I mention the P5Q Pro isn't DayGlo?