The CT4-V Blackwing is the best sports sedan GM has ever built, and most people will still buy the M3. Here's the thing — these two cars barely compete with each other. One's a 472hp twin-turbo V6 with a manual and magnetic ride control, built by a team that knew this might be Cadillac's last shot at relevance. The other is BMW's most refined M car in a decade, backed by decades of aftermarket support and a badge that doesn't need explaining at Cars & Coffee. What we broke down in this one: → Why the Blackwing exists at all (and why it almost didn't) → The real driving difference — clinical precision vs analog drama → Cost of ownership and where depreciation actually hits harder → Aftermarket support and why the S58 platform is miles ahead for modding → The honest answer on who each car is actually for If you want the car that makes you feel something every single drive and you don't care about resale or bolt-on catalogs, the Blackwing is genuinely special. If you want a car you can...