Yes, it should have the later floor. I said 'B*gg*r it!', and left it 'as is' on my Tamiya and ICM kits, as it can't really be seen that clearly anyway, and a bit of paint did the job of the floor.
EDIT: - I lied - I forgot I added a simple wooden floor, made form plastic sheet, to the ICM model, but just painted the Tamiya version.