Drew throws for way more yards than Aikman did, 15% more yards per game. On average his completions were for 1 yard more than Aikman's. Naturally as you go from an 11 yard pass to a 12 yard pass, your completion percentage goes down. AIkman was a short pass QB, Drew is a long pass QB.
Drew had more TDs, and a better TD to INT ratio.
Drew had 8 3500+ yard seasons: Aikman none.
Drew is in the top 10 all time in Comp, Att and Yards.
Drew is nearly on a 4000 yard pace, meaning he would hold the season yardage record for 3 clubs in the NFL, and not just any franchises: New England, Buffalo and Dallas who have gone to at least 14 Super Bowls between them.