I bought the purple gen 3+ darts, I have no clue if the colors have anything to do with it, but the ones I got have a very poor fit in the barrel, and I'm losing around 20-30fps as compared to the purple darts that came with the worker swift. Mind you, these are much more durable than the gen 3 darts from worker, but the performance just isn't there.
*Edit* A plus side of these particular darts is that they work VERY well in the nightingale and the Phoenix. If for whatever reason waffleheads aren't working well in your flywheelers, the purple gen 3+ darts might be a good alternative.