I don't know any people with dual core or better and 32 bit system, so i think, that 32 bit version of games like that is quite stupid, because ATS 32 bit won't be able to use more than about 3,5 gb ram. So it may have problems with 30+ mods (in ETS2 I have about 45) and ultra graphics. It's only my opinion.
PS i heard, that there was one version of ETS2 64 bit, but it was very unstable, can anyone confirm this?