Ok let's go there. Look below and tell how they are different. Yes, they had different coaches (Romo had Parcels/Wade Phillips and Dak had MM and they both suffered through Garrett) and schemes, and as I already mention different strengths and weaknesses but at the end of the day their careers are damn near identical in every category (and as Parcels once said you are what your record/stats say you are).
both have exactly 8 seasons with at least 8 games played
Regular Season Record:
Tony Romo: 78-49
Dak Prescott: 76-46
Regular Season Stats:
Post Season Record:
Tony Romo (4 appearances) 2-4
Dak Prescott (5 appearances) 2-5
Post Season Stats:
When comparing the teams they played on, you will see they have had similar talent surrounding them including talent on the OL and offensive skill positions:
Tony Romo's Team All-Pro /Prow-bowl/HOFers & Potential HOFers (OL bolded. Green is Romo's Pro bowl years):
Dak Prescott's Team All-Pro /Prow-bowl/HOFers & Potential HOFers (OL bolded. Green is Dak's Pro bowl years):