Abhishek's performances in guru ws a little bit better thn in yuva. But still mani ratnam has a long way to go to get a good acting out of bachan. In guru ther wer some scenes wher abhishek relived his character from yuva in guru, and in the scene whn he gave the speech in court ws the mr.hyde of dr.jekyl in yuva.
The point is, abhishek has the tendency to stay in the same mould in depictin his characters. Evn ram gopal varma seemed to lurk in the angry old man of his dad into abhishek.
On the other hand, madhavan improves movie after movie under mani ratnam, and so did arvind swamy and karthik whn working in mani's films.
But abhishek is the first actor tht repeats the same kind of performnces is his past film, except he is clean shaven in guru.
Anyways, abhishek still has a long way to go and he is also kind of overrated in the choice of movies he picks.