Tesler-Mabe doesn't sound like Hendrix. She's playing a Hendrix tune, but sounds like herself playing Hendrix, especially in the solo, which is not an exact copy. Her control of legato is even better than Jimi's.
Her cover of Isn't She Lovely sounds like her. No one would mistake her cover of Pride and Joy for Stevie Ray's; she doesn't run monster strings tuned down a half step, she double-times the tremolo picking and sticks in the 12th fret harmonics.
When I could still play I sat in with bands that covered Albert King, BB King, Otis Rush, Guitar Slim, T-Bone Walker, Howlin' Wolf (Hubert Sumlin) and Jimmy Reed (Eddie Nolan) tunes. But I didn't sound like those guys. I sounded like myself playing those guy's tunes.
Excellent example: Clapton playing Born Under a Bad Sign. It's an Albert tune, but Clapton sounds like Clapton, not Albert. Stevie Ray's playing on Texas Flood doesn't sound like Larry Davis. Danny Gatton playing Mystery Train doesn't sound like Scotty Moore.
She does try to sound exactly like the originals on the History of Rock Tones thang, and does a pretty good job of it.
Coming up with original material is a whole different ball game. Far as I can tell this is all her. I don't especially like delay tricks, but her control of double-stop bends is complete. I believe she was seventeen on this one. She's nineteen now; give her time.
There's also always the possibility that "being yourself" sucks.