Personally, I try not to compare DPS because you only rarely ever face such a nice controlled environment where meaningful comparisons can be drawn. Not to mention you face an E-peen contest with the highest numbers people can pull out, despite the fact they forgot to mention they were flasked, in a raid, had certain buffs , or any number of criteria that caused the discrepency.

If you think you can improve, by all means, do so, but the important part is accomplishing what you set out to accomplish, not what shiny numbers you can get a program to spit back out at you.