I have had both Eroscillators. The "top deluxe" IS more powerful. The regular one left me underwhelmed.
I wish EF would be able to offer JUST the device and then each attachment separately, because yes...the fingertip attachment is by far the best.
The Seven Pearls is supposed to be insertable but then....the oscillations are killed by it being inserted!! The mustache one is just friggin bizarre. A lot softer than you'd think by looking at it. It actually created a BREEZE. Small, but still. It was funny.
After I'd tried the cheaper version I was totally put off of the E. I don't require the Hitachi but I do require some power and something past "surface" vibrations. I think the top deluxe version + fingertip attachment manage that nicely. It's not the most powerful thing out there but it is good and I was able to orgasm.