A nice set of clones there. I like the weathering and paint apps on the galatic marines. The only thing I don't like about them is the fabric used. The fabric in that scale looks too course and holie. A finer fabric would have seemed more in scale to me. I think it needs to be trimmed a little. Over all very well done figures.
As for the 501st SA/w removable helmets, I think the Evo clone came out the best. The letter A on his chest seems to be the most accurate. I like how the A splits at the end. It's funny how when making the same figure three times we get completely different looking figures.