For an extra $200.00 is it worth getting the i7 over the i5 for game development?

I'm thinking of buying a new iMac (non-retina). For an extra $200.00 is it worth getting the i7 over the i5 for game development with Unity?

3.4GHz Quad-core Intel Core i5, Turbo Boost up to 3.8GHz
3.5GHz Quad-core Intel Core i7, Turbo Boost up to 3.9GHz