Silver is pretty much a colourfill and the Silver Quiggle is pretty much standard. There are bits of shiny on it, and it is a nice, light shade of grey. There's really not much else to say.

The Desert Quiggle, on the other hand, shows what Neopet artists can do when they bother to care. The toga it's waring is very nicely coloured and shaded with a nice little cobral pin and scarab buckle for details. The base colour also works very well, though I am not sure how well the bluish stripes will really work. The eyes with their odd black marks look almost as if it's wearing glasses. The only really odd things are the black and red bracelets. I think gold and blue would have worked much better.

Other thoughts may be made here.