There are two reasons tires have a larger impact on vehicles with more range.
For the same vehicle, the impact of tire differences, is a percentage of the reference.
Example: (A 10% difference on a vehicle with 200 kilometres of range is 20 kilometres.
For a range of 300 kilometres, the 10% difference would be 30 kilometres).
The heavier the vehicle, the more tires matter. This is because, the more weight that is put on a tire, at the same inflation pressure, the greater the energy loss by the tire. Vehicles with extended range are heavier due to the additional batteries, so a change in tires will have a greater difference.