It's the same person, I'm not sure why they appear different to you but if you take your time to examine the pictures carefully I'm sure you'll find similarities.
http://sougouwiki.com/d/%A5%EF%A5%B1%A4%A2%A4%EA%A1%FB%A1%FB%BA%CA%A4%CE%C9%F7%C2%AF%CC%CC%C0%DC
The link above will lead you to a list of actresses who starred in UGUG-007.
桜井幸美 is her alias in the movie, さくらい葉菜 (Sakurai Hana) is her real name (or should I say stage name?)
If you enlarge the cover pic, you'll see at the middle bottom left a picture+name of the woman you're looking for. That name displayed is 桜井幸美, which points directly to さくらい葉菜.
Deductive reasoning: Since the list of aliases matches the list of real names provided by the order in which they appear, it is logical to believe that the first name, 桜井幸美, shown in the Title's column, matches the name さくらい葉菜 in the Actress column.
Now I'm not going to explain myself further regarding this; you can't expect me to provide info of titles/actresses and having the obligation to make you believe what is true.
Your perception creates your reality.