Crazy all-in bets: 2 very similar situations with AKs PF

Well in both of these situations I'm 1.5x-2x average chipstack. Both are 20+2 stars freezeouts. I don't see this too often, but without reads I think I have to call this every time. It is moderately early in both. What do you guys think?

PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (9 handed) FTR converter on zerodivide.cx

CO (t2069)
Button (t2115)
SB (t2095)
BB (t5370)
UTG (t3349)
Hero (t3375)
MP1 (t2332)
MP2 (t600)
MP3 (t1000)

Preflop: Hero is UTG+1 with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img]. UTG posts a blind of t100.
<font color="#CC3333">Hero raises to t300</font>, <font color="#666666">7 folds</font>, <font color="#CC3333">BB raises to t3349</font>, Hero calls ...

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (9 handed) FTR converter on zerodivide.cx

BB (t11015)
UTG (t4150)
UTG+1 (t6098)
MP1 (t1122)
Hero (t8680)
MP3 (t13620)
CO (t9775)
Button (t1430)
SB (t4730)

Preflop: Hero is MP2 with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to t600</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">CO raises to t9775</font>, <font color="#666666">3 folds</font>, Hero calls ...