Ah Sarah, she was wonderful. I've been under the impression it is the same person. At least one photo Marianna/Helena uses is the exact same photo Sarah used at Jewels. Haven't seen Marianna/Helena in person yet to confirm it is the same tho. The other photos and videos on her site sure look like my memory, but memories are fuzzy.

Saw Sarah at Jewels back in May of 2012 - TER ID 113620
Saw her on Long Island as Marianna/Helena last April.
Excellent oral both times. Fun time with a real spinner.