Osaka or Tokyo for two months?

Hey, I will be staying in Japan from late june until the end of august on working holiday visa. Because it is quite difficult to find two different jobs for a month in two cities, I will most probably stay in one city for the whole two months (of course, I will travel to nearby cities as well). In your opinion, what would be the best choice to make when choosing between Osaka and Tokyo? I really like both cities and think that each one has its own charm, but since I have never been in Japan before, I would appreciate if you would share your own experiences and maybe share some advice. Thank you!

by tomisek2