We have Voler and Champion System. Voler bottoms are sheer. Champion seems to perform better and has more comfortable padding IMO. Just be careful that the description matches your image. We ordered a navy and "buff" kit. The proofs were right. Apparently, it was described on the order as "royal" and something that's a pretty bright lemon. And that's what we got. It's pretty day-glo. At least it's not our race kit. It goes nicely with my bike but is not correct.
The best thing about Champion is that I could get a men's XS kit and it fits great whereas I'm somewhere in between men's and women's smalls in Voler and my race jersey is not so aero. (I'm a woman with a long torso and shoulders). Good prices. Low minimums on everything but some accessories like socks. Voler isn't bad, though. Could be much worse. Very wearable, especially the race jerseys.