If both were playing in today's era Hayden would still average 50 because Australian wickets are still mostly flat. Labuchagne's last few years have been similar to Hayden 2001-04. Both put up huge numbers at home.
Sehwag probably wouldn't be opening. The lack of opportunity to make huge double and triple hundreds, as well as harder home pitches to bat on would see a noticeable drop in his average. No Tests in Pakistan would also hurt his average.
I'd imagine Sehwag averaging low 40s overall playing a similar counterattack role as Rishabh Pant does. Likely batting at 5 behind Kohli. He would do better outside the subcontinent then what he did as an opener but not as good at home.
Sehwag probably wouldn't be opening. The lack of opportunity to make huge double and triple hundreds, as well as harder home pitches to bat on would see a noticeable drop in his average. No Tests in Pakistan would also hurt his average.
I'd imagine Sehwag averaging low 40s overall playing a similar counterattack role as Rishabh Pant does. Likely batting at 5 behind Kohli. He would do better outside the subcontinent then what he did as an opener but not as good at home.