What's the difference? I think I do have the full version. Could this be why I noticed some odd, faint lines moving up and down on my monitor? O.O
"Redimized" is shorthand for "reduced and optimized". It is not drastically reduced however. So it is probably the best way to go, if only because it will leave you more room for other texture replacers and so on (e.g., LOD textures).
As for the moving lines, that would be either your monitor or your graphics card, most likely. Running out of VRAM will slow things down,
dramatically, but it should not introduce such glitches, as far as I am aware.