It should be remembered that Putin and Assad are two different people. This fact alone will already let you know that they are different from each other. Putin is known to be the president of Russia right now. Assad, on the other hand, is the current president of Syria. They are known to be very strong, especially in terms of their personalities.
They have a tendency to take control of the whole government and all of the aspects that are related to it. They have one similarity, and that is the fact that they have strong military backgrounds, which is probably the reason why they follow a very strong and similar leadership style.