SilverWook said:
The "in universe" explanation could be Han has added more smuggling compartments. There actually was a scene in the Marvel comic where the bad guys know where to look, but false bottoms have been installed, faking them out.
That doesn't really explain why the Falcon has more landing gear than before. The only good explanation is that Han installed something heavy in the front end between ANH & ESB, and it required adding more landing gear in the front.
Will be interesting to see how the new Falcon prop turns out.
Well, if we extrapolate linerally, the Falcon could have...a lot of feet!