According to HKFA, they are the same:

Hoh Ang-Yin / (???) http://hkmdb.com/db/people/view.mhtml?i ... y_set=big5

Ho Ang-Yin (2) / (???(2)) http://hkmdb.com/db/people/view.mhtml?i ... y_set=big5

Can anyone confirm and update?

Agree...merged.
Also merged Ho Bak-Yin ???

Lighting
Enhanced Romance
http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng

And changed primary name to Ho Pak-Yin

Ho Ang-Yin ???
Lighting
The Turning Point (1983)
Hong Kong Criminal Archives - Female Butcher (1991)
See You Next Time (1993)

Hoh Ang-Yin ???
Actor
City Maniac (1995)
Lighting
Sweet Surrender (1986)
Justice My Fool (1993)