There's no need to explicitly raise StopIteration as that's what a bare return statement does for a generator function - so yes they're the same.
As of late 2014 return is correct and raise StopIteration for ending a generator is on a depreciation schedule. See PEP 479 for full details.
https://stackoverflow.com/q/14183803/248296https://www.python.org/dev/peps/pep-0479/
Victor