It depends on what you mean by “better.” If you mean advancing his country’s interests in foreign affairs, even if those interests are evil, then Putin.
If you mean better in the moral sense for his country, then Obama.
For example:
Obama stood by as Syrian civilians were massacred = Bad
Putin aided the Syrian government in massacring its civilians = Worse
Obama negotiating nuclear treaty with Iran and lifting sanctions = Bad
Putin giving them nuclear technology and missiles = Worse