The small case, 76 x 54 x 113 mm inside, is for the old bundle model. The large one, 76 x 54 x 124 mm inside, is for the new model. If you are unsure, measure the height of your bundle with the shrink wrap on.

No. The new model is just over a centimetre taller than the old one and therefore does not fit the small case. That is what the large size is for.

Yes, the Booster Bundle Display Case, for the display of the old model. Inside, it measures 272 x 155 x 115 mm.