I don't know why but I don't like the first one. Maybe it's because of the green and also it looks kind of erm not made from the artists point of view. The circles on it i like because instead of them being perfectly shaped they are bent which adds character to them.
The second one I like a lot. the blue is a nice shade imo and the way you've use a comparison, the sharp edges squares with the smooth edged circles. The jigsaw like texture is well placed, if it had been all the way round I think it would have taken the effect away.
The Text on both just don't seem to look well imo and I'm not sure why, might be the font.