I was messing around on youtube recently, and some videos I watched informed me that the JPN version of Sega Rally 2 has some different cars and weather effects than the US or Euro releases.

Then I heard later that the European version of Sega GT has a bunch of European cars that the US and JPN versions don't have.

Can anyone verify these differences? Which version of each game is the best to get for someone who has not played either game before, ever.