D-Day for "Torch" was November, 1942? No, it was in November, 1942. See, it refers to the DAY not MONTH.
The RAF didn't actually redesign the Spitfire due to the Fw-190. Supermarine was already in the process with organising an upgrade which would become the Spitfire Mk.VIII. However, what the Fw-190A did do was make Supermarine get it's V airframes and slam a two-stage Merlin 70 engine in 'em. So...the Fw-190 rushed the improvement of the Spitfire.
I'd say the Spitfire IX because it was out in 1942.