I’ll start with the Porsche 997, the 996 looked alright imo, but it looks “like a 90s Porsche”, the 997 made it look sleeker and more modern. Still looks good today.
As for cars that looked worse after a facelift? Maybe the facelifted 6th gen Camaro? The 6th gen looked great pre-facelift, but they did something weird with the headlights and now it looks so-so…
The 2017 Lincoln MKZ facelift made an ugly car attractive. The 2006 SAAB 9-5 facelift made an attractive car ugly.
As a 08 9-5 owner I resent that. Yet also agree. My old 01 was a much prettier car