In these versions featuring the suffix fully spelled out in the title screen ('Junior.') :
1. You are only allowed to enter a name up to three letters long in the High Score list (instead of twelve).
2. In the Vines and Chains stages, Red Snapjaws regenerate at Mario's feet after being killed by fruit starting in L4 (instead of L5).

The Japanese boards have all four screens displayed in their original, logical order 1-2-3-4. For the US board, it was changed to somewhat match the original Donkey Kong's 'How High Can You Try/Get?' theme with the screen order as follows :
L1 : 1-4 (Springboard and Mario's Hideout stages both omitted)
L2 : 1-2-4 (Mario's Hideout stage omitted)
L3 : 1-3-4 (Springboard stage omitted)
From L4 onward, all four stages are displayed in order, as in the Japanese version.