I've been following a thread on Lama Pai elsewhere and as the discussion turned technical I was astonished at the similarity with Hung Gar, in particular the Crane of course but also the "water" element type stuff from Hung Gar and actually just a lot of stuf from the Fu Hok form. I've seen a few mini-clips now including CTS and I saw really classic applications from the "metal" and "fire" sections of Sup Yin. Most of the terminology is the same too although that's probably mainly just cuz it's Cantonese but how many styles make extensive use of gua choi, pahl choi, tsop choi etc.

Any historical overlaps or famous exchanges between past masters to account for this stuff or is it just stylistic tendencies for southern styles?