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 '69 Camaro was (IMO) the best looking Camaro of all time…even though the '68 was the original.
I grew up with the 3rd gen mostly… although there were a lot of 67 - 81 models on the road.
I currently own a 6th gen. It’s my 4th Camaro znd easily the nicest driving, snd I think the best looking as a 2018 SS 1LE model. It has the splitter, diffuser, NPP quad exhaust, sunroof, and the Sych 2 Infotsinment system with wireless Android/Apple Car play. So I think the non - facelifted 6th gen is the best looking…and most like the 1969).