Having been to both, Silverstone (F1) and Battersea Park (FE), the only real difference in actually watching it is the noise levels. Formula E works to a standard that F1 alludes to, F1 spend millions on R&D to get an edge only to find that the powers that be veto the innovation, FE all use the same car, same power, it's more of a driver/tactical race style, I like it.