In a sudden stop event, assuming the driver does the same tasks (lifts foot off accelerator pedal, moves to brake, then presses brake) - an standard ICE vehicle simply stops accelerating (minimal engine braking). An EV starts decelerating as soon as the foot is lifted from the accelerator.

We're not talking EVs that are double the mass (usually 10% increase over ICE), so a 20% reduction in speed (probably more) on an impact is more important than that 10% weight increase (impact force is roughly equal to mass x speed).

Petrol engines have a nontrivial amount of engine braking due to the throttle. If you have a manual car you can easily compare it to coasting by disengaging the clutch. Bicycles also naturally coast thanks to the freewheel. If you're used to a bicycle then the engine braking of a car is quite surprising.

Based on a cursory glance at google results, 10% is at the lower bound of weight increase, and in sudden stop scenarios I would assume tyre grip is the main factor in speed reduction potential, not engine/regenerative braking. I'm not aware of any convincing studies showing a clear advantage for EVs in these scenarios.