Basic Daytime water,changing Reflective color,will this be effected?

Okay, I have a good and bad computer, the 'Basic daytime water' looks different on BOTH, like the one on the good computer looks better,not the subject though.

I changed the Reflective Color of basic daytime water to a skybox, a daytime skybox, to change effect of the water, I think it looks much better (only on the good computer though, the bad computer is using Unity 3.5.5,not 4.1 like this one,not sure if that has an effect on it) but I was wondering 2 things, why is it one views the textures,like really good, and the other just sucks? And would changing the reflective to a skybox,would this have any effect on the future? maybe bugging out,or just stop working?