APL76
Blue Belt
Kinda both. If you look at the side to side turning in chum kil, are you using your hip or waist to lead the movement. Or if you look at a forward and backwards bending, kulo wing chun has a motion called wan wun yiu, which is an emergency technique involving controlled bending back with the force of the opponent's strike to recoil forwards with a counter.
Just read this. Its interesting, it seems, strangely enough that Ku Lo wing chun has more in common with Guangzhou wing chun than it does with Yip Man wing chun.