Is the wheelbase longer?
I can't say I can see it, but if they have managed to lengthen it due to the engine installation I'd be pleased.
The car looks fast, at first glance. Its is slimmer with the opportunity for a better airflow over the car and to the diffuser.
The money is in how tightly sealed that floor can be and what the Y250 and bargeboards can do. I'd expect that to be the area of focus all season long.