Big debate on electric vs ICE. I personally never cared much for the E class, although it is a great car in every way. The i4 makes me turn my head though in terms of looks. I would assume that the E class will be more comfortable, and the i4 would perform better (you did not specify what E-class so I am assuming e200). So depending on if you are looking for an electric fast sedan with great looks (i4) or a sleek comfortable traditional saloon (e200) you can base your decision on these factors. Not talking about price because I have no idea what they cost like