>>315037416
Competizione is great for actual simfags. It's far more polished and modern (sweet jesus, this audio design), but you can drive only GT3/4 cars. AC is fuck around autism sim where you can do anything, from high tier formula races to casual touge runs with angry twelve year olds on a public server. All of the cars, all of the tracks, enormous modding community, tons of work that takes this game to another level.

You probably want original AC, unless polished GT experience sounds appealing to you.