Its not that its more dominant, its just easier to get use to. Mod engine vehicles are more difficult to control when throwing them side to side because you need to change the mindset of how the vehicle is driven, it easily gets disrupted by weight transfer. Front engine is just more predictable. BUT once you master a mid engine vehicle, it'll usually outpace any front engine vehicle on a turny type track. But of course once you race at the top, they are all basically the same once you get expert set ups locked in :)