Interesting stuff...thanks for the reply!
When I was 5 years old I learned "Che Kuen" aka Ng Lun Ma from Wong Ha lineage (which is essentially similar to Chan Heung lineage).
I see a lot of similarities behind the one I learned and the one you presented from Fut San. Both essentially getting the students accustomed to the basic footwork and hand movements with repetition on either side. Obviously there are certain differences with the way we move but end result of stance and order is pretty much the same.
I actually quite like the difference in your Che Kuen.