Assume 100BB effective stacks, 6max NLH.

Situation 1:
Villain (MP) has AK, Hero (BTN) has 55.
Villain raises 4x, hero raises to 12x, villain folds. Is this a good thing for hero?

Situation 2:
Villain (MP) has 55, Hero (BTN) has AK.
Villain raises 4x, hero raises to 12x, villain folds. Is this a good thing for hero?

Situation 3:
Villain (BTN) has AK, Hero (BB) has 55.
Villain raises 4x, hero raises to 12x, villain folds. Is this a good thing for hero?

Situation 4:
Villain (BTN) has 55, Hero (BB) has AK.
Villain raises 4x, hero raises to 12x, villain folds. Is this a good thing for hero?