XplusYplusZ wrote:

When the vehicle was first launched, many (including ADs) didn't know that there were two stages to folding flat the second row in the 7 seater. You have to apply a little(ok, a LOT) of weight onto the seat backs, but the second row does fold almost entirely flat. (photos from an old post on here, courtesy of Hugh Martin).

Just folded Forward, not locked into position:

Click image to enlarge

Folded forwarded and locked in position:

Click image to enlarge

Your list is about right.
The 4pots are probably worth avoiding, given a couple blew up and they swiftly moved to 6pots. I'm sure loads of them were fine...but... do you really want to chance it out of warranty!?

The X-Dynamics had fancier exteriors, (darker grey bumpers, black rear tow eyes, shiny black sills), but not full leather seats. Non-X-Dynamics had the matte plastic sills and a lighter coloured grey bumper. They generally had either full leather seats, or cloth seats..
AVOID cloth seats from the earlier models, they stained pretty badly even from just water drips.

From low to high trim levels:
S
X-Dynamic S
SE
X-Dynamic SE
XS - kinda floats around the HSE level of trim I think. 75th also sits around here but is a very marmite colour. Maybe good for a deal to be struck though..
HSE
X-Dynamic HSE
V8 / Carpathian / Spectre..

for the MY23/23.5s there were also a couple of important differences which varied on the time of day the car rolled out the factory it seems - where either a 9 or 11inch central display screen was built.
Similarly interchangable on 23 years was the drivers console - it may be two analog dials with a small screen, OR a big Interactive Driver's Display (many people prefer the IDD).
In MY23.5 they did away with standard air suspension, so if you buy before MY23.5 you'll almost certainly have air suspension (though you could option springs specially). For MY23.5 you had to pay extra for Air - 7 seaters had to have air..
It's a minefield and not all very obvious..