Heh, I should reply to this thread more often instead of creating a huge list.
Nova SS vs. Duster- Mopar A-bodies are awesome. Looks better and it's not a Nova.
Horizon vs. Chevette - Horizon. Not the best year to choose, but still better than that Chevette...those were horrible. I quite like the Shelby versions, anyway.
Torino vs Chevelle - Torino. I really like that gen, but 72-later...blargh
Acura vs Honda - I prefer the Honda grille.
Chevelle SS vs. GTO - I just love early GTOs and I see too many Chevelles.
WYR Group B homolgations - 037 Stradale based on looks, alone.
Modern Hot Hatches - I know the Fiesta ST is a great car, but the Peugeot looks the best, by far.
Foxbody Mustang GT vs SN95 Mustang GT - couldn't care less. I guess I'd take the 95.
100k Sports Cars - Maserati is the best looking and has the glorious sound from that Ferrari-built engine.
Hot Rod Magazine Muscle Cars - I'll take that Olds. Less common, better styling cues/trim. Great wheels on it, despite being huge. Didn't even consider the Mustang, since it's not comparable to the other 3. Should've been a Galaxie, or something.
GT40 MK1 vs. GT40 MK2 - Mk2, I guess. I like the rear scoops.
Minicars - as much as I love the 1957 Edition 500, I really want a MiTo.
Lamborghini Gallardos - LP570-4 Spyder Perfomante. I prefer the convertible.
Pontiac Catalina vs Dodge Dart - That Dart looks damn-near perfect. Odd comparison between a GM fullsize and a Mopar compact.