I own a Range Rover (Sport) and have driven a '15 or '16 WRX STI in snow as well. If the snow is much more than 8–10 inches deep, the WRX STI is going to be iffy, while the RR is literally going to be able to rise above it, up to a point. The RR also has a locking Txfr case, which makes some amount of difference.