I just started using this set myself. They look and fit great. There is definitely a color difference. The bottoms are totally fine. The top is slightly grayer than the bottoms. Having said that, under the armor, no one would ever notice. Not even myself when looking in a mirror. After having done a ton of research on undersuits, this option definitely provides the most bang for your buck hands down. The only downside is that they don't ship outside of the US. A member of Titan Garrison was kind enough to receive them for me.
I can provide pics of me with my armor on if you want to see how it looks.
Jamie