It seems unlikely to me that these are different people, so I propose a merge. Is it possible to tell which of the Big-5 names is correct? Can somebody that knows Big-5 merge them for me?

http://hkmdb.com/db/people/view.mhtml?id=15767&display_set=eng

http://hkmdb.com/db/people/view.mhtml?id=16893&display_set=eng

I saw 6 AM and I can confirm they're the same person. Merged and added 張智恆 as alias.