The only good story in Thunivu I saw was Ajith giving people info about Bank Scams otherwise this is just same as Beast.
Spoiler Alert
In Beast Vijay tries to save Mall from Terrorists here Ajith tries to save people money in Bank from a Crooked Bank chairman by hijacking the mall waiting for the chairman to come and then he finds way to get money back to the people. In Beast in the climax you see Vijay fighting against Pak Airforce here you see Ajith fighting against Indian Coastguard. If you liked Beast you will love this if you were neutral towards Beast then you will find the second half interesting regarding bank scams. Or if you are like me who hated Beast all you can do is come out of the movie theatre saying it was better than Beast coz he gave some good info on Bank scam other than that there is not much difference between the two.