Please forgive my ignorance, but is there a list or group of standardized forms taught by Hung Gar practitioners? The reason I ask is that I have seen about 3 or 4 different interpretations of Tiger/Crane, and that is the only Hung Gar form I am really aware of. I learned the Kenpo version of T/C, but I am also interested in learning the original, as taught by Wong Fei Hung.
Within one school, ten students may execute the same set slightly different from each other, even though they share the same teacher.
There are various lineages under the Wong Fei Hung branch of Hung Gar. The most popular are the Lam Sai Wing & Tang Fong branches, to name a couple.
For example, even within the Lam Sai Wing branch, there are varying lineages. The most known are: Lam Jo lineage; Chiu Cao lineage; Lau Jaam lineage; Chan Hon Chung lineage; Wong Lee lineage; etc.
The sets that they share in name have slight variations among them. To my knowledge, they all have the 4 pillars (Gung Ji - Taming the Tiger; Fu Hok - Tiger & Crane; Ng Ying Ng Haang - 5 Animals & 5 Elements; Tid Sin - Iron Wire).
However, their subsets vary. Some have plum blossom set; some don't. One has a praying mantis form. One has this set; another has that set.
Tang Fong's branch is different from Lam Sai Wing's branch. Their techniques & sets are similar, yet different at the same time. They don't practice the subsets listed above. Look-up HG1's link to Tang Fong's branch via Sifu Frank Yee's Hung Ga Clubs.
Then there are other less-known but just as legitimate branches as well. Aside from Hong Kong, there are followings in Singapore, Malaysia, mainland China, etc. There are also the pre-Wong Fei Hung Hung Gar schools, as well as "village" Hung Gar which doesn't necessarily resemble the Hung Gar that you may have seen.
Over time, variations have occurred, through different teachers, students & generations. This is not unique to Hung Gar. If you look at Kenpo after Ed Parker's death, you'll see splits among various teachers who were formerly comrades under Parker's guidance. They may have altered some of their forms or teachings in order to make it distinct from other branches of Parker's Kenpo.
In a nutshell, there is no standardized list of sets shared by all Hung Gar schools. And the only way to learn Hung Gar's signature set, Fu Hok Seong Ying Kuen (a.k.a. Tiger Crane set) is through a Hung Gar Sifu. Hung Gar pracititioners should be able to spot whether someone has learned it aside from a Hung Gar Sifu (via YouTube, video, book, Kenpo, etc.). If there's a club near you, try to check it out. You may like it and supplement your Kenpo training. Good Luck!