If I may make a suggestion -- give them both a quick wash. They'll look way better. For some reason, blue one reminds me of Cobra Commander. I think the blue one would look better with silver in place of the vertical red ribbed stripe (though that's neatly painted, props!) and the orange patch on the right leg.
The green one would also look better with one less color, I think. I'd get rid of the orange. Paint the shoulder fin red, the opposing leg fin red, and the current red fin green. Make the tassle red, too, and highlight the mark on the head (silver would be easy).
Just my opinion