More of a general coaster thing:
When people get confused between corkscrews and barrel rolls. Like seriously? It happens all the time on TV and stuff. One particular one which gets me is when somebody calls the last corkscrew on Nemesis a barrel roll, but even John Wardley has made that mistake!
It's hard to see due to it's location, but the profiling of Nemesis' final inversion does actually closer resemble a 0g roll with no ramping than a traditional corkscrew/wingover. Its entrance and exit are practically inline and the element as a whole is notably drawn out/stretched, as opposed to the far more 'squashed' aerial profile of your average corkscrew.
It's tricky to fully explain verbally, so here's an aerial view of Nemesis' first and final inversions, as well as its 0g roll as a comparison:
As you can see, the entrance and exit of the first, classic corkscrew are fairly far apart on the element's x axis, with a very visible lead-in and lead-out (where the track moves first in one direction, and then the other, with the centre of the maneuver being almost perpendicular to its entrance). On the other hand, the second corkscrew features a much more fluid, dynamic shape, with far less lateral profile, lead-in/lead-out or 'snap' to it, as well as being visibly far more drawn out and shallow than its predecessor.
In short, the traditional corkscrew resembles a drawn out 'S', whereas Nemesis' final inversion closer resembles a flat, stretched out 'V'.
Apologies if this explanation comes across as very broken or rambling, as I'm fairly sure I missed some major points out. I had to fight to restrain myself from drawing up any full technical diagrams.