The only honest way you can compare two players is to ask how they would do in the other's situation.
In Romo's 5th or 6th year starting
--they had one of the worst defenses in th league ..and son to be the very worst
-- one of the worst offensive lines Dallas has had in 25 years
--an average to below-average WR group
--a below average RB group
--crappy coaching and offensive coordination
--rules favoring QBs are changing but not where they are today
In Dak's 5th or 6th year starting
--they have one of the best defenses Dallas has had in 25 years...top 3 since 90s at worst
--a top 5 ranked offensive line by most metrics
--probably the very best (certainly the deepest) WR group in Dallas Cowboy history
--a very good RB tandem in Elliott/
--a good all-around coaching staff (and a HC that won a SB)and coordinator that other teams envy and are trying to hire
--rules favor QBs now more than ever
Ok....now switch places.
Drop a veteran Romo into today's situation. (not 2007, but more experienced)
And drop Dak into 2011-2013 range.
The situations are just not comparable...and especially or so going forward.
Don't even think about comparing numbers in those two radically different situations.
Like comparing and person driving a VW to one driving a Ferrari and asking why the VW didn't perform better.
I'm happy that the perfect storm is forming for Dak to where he has developed as a QB but is still fairly young, yet has a young and rising team with a good staff around him.
But at this stage in Romo's career, this franchise was in bad shape.
That's just how it worked out.
Pick whoever you want...or don't pic at all and just pull for TEAM.
But you have to use rational context.