Joye or Janty Ego is real original Ego
Most things just called Ego are clones and some are good and some are not
My guess is TW's could be a clone because the slim 510 I got there did not have a Joye atty (from the looks of the inside I would guess it was SLB). TW also included the incorrect cartridges in my 510 kit (mega ones), and as I found out after it damaged 5 510
batteries, they also gave me the wrong charger cable (a 420mA output Ego-type cable). So 4 hardware items in the kit (battery, atty, charger, carts) and 2 were wrong.
I recommend for your first Ego you
buy real Joye or Janty (Joye is what you will mostly find in the US) - see Liberty-Flights.com (press the 20% off first, upper left front page) and Cignot.com for example.