I studied PN WC under Felix Leong.
Such an open ended question makes it difficult to answer.
There are lots of differences in the PN style. Because of that, I'm not sure whether you would say it compliments other WC styles. The stance is different - like a little shoulder width horse stance. All the forms are quite different in choreography. There is no luk/poon sao.
Essentially because of those differences, you have to assess why you do something one way and not another way.
I see a lot of stuff associated with PN WC that I've never seen before. I'm not sure whether that's giving the correct impression of the style.
http://www.fatshan-wingchun.co.uk/demos2.htm
I never heard of different stages of chi sao. Or any repetitive circling like in those vids. AFAIK, PN chi sao is just grab each others arms and start fighting.
PN At Yiu - just grab each others arms and try throw each other.