All boot space is the same, they all came with the drop down boot floor cover. You can only drop it right down though by removing the polystyrene tool holder and removing the spare wheel if you have one.
Yeah, I saw on an 'older' SQ2 and the floor could be dropped. We need this ideally for the dog as he's a big lad. But I'm not sure if the B&O Sub gets in the way as I know that is under there if you take that option? At least I think that is what it is.
I'm looking for a boot liner from various boot liner provider sites, I'm guessing SQ2 2016 > will fit then if there have been no shell changes.