If your presentation is going to be hours long and incredibly boring, by all means cut the detail super fine. If it were me, I'd stick to the three, hybrid, plug in hybrid, and all electric. Explain those and call it a day.
Yeah of course there all kinds of variants (except really in the all electric world - a battery powers an electric motor that drives the wheels). Hybrids get into a bazillion versions and it is pretty much just academic how they are built - or where is the electric motor and how is the battery charged?
I think the chart you found is not very useful, probably a lot outdated, and confuses the issue more than helps it.
2014 Platinum White FFE (Turning in mid Dec. 2016 25,000 miles)
2013 Ingot Silver FFE
2012 Titanium ICE Focus
2014 Tesla Model S 85