GTsports looks more realistic (the cars, road, sky, buildings,the lighting).
But I like the mountains in the far distance better in the older version.
GTsports runs "smoother" than the GT6 video, where frame rates are all over the place (micro sutters).
I think GTSports overall does look alot better.
Once its released and polished up abit,... maybe gotten a few patches, it ll be a alot better than GT6.