Curious Results

[rod]

In a recent club game this deal was played 8 times with 8 different results and 7 different contracts.

Matchpoints, South deals, NS vulnerable

♠ AKQ5
♥ J1086
♦ J97
♣ 96

♠ 8764
♥ 72
♦ K8643
♣ 54

♠ 93
♥ AKQ43
♦ AQ2
♣ J73

♠ J102
♥ 95
♦ 105
♣ AKQ1082

With two passes to you as North, what would you do?

I posted a poll on the Bridge Winners site and 60% of respondents (so far) voted for 1♠ which was also my choice at the table. East overcalled 2♥ and my partner closed the auction with 4♠. This made after the opponents cashed only three of their red suit tricks before East tried to give partner a heart ruff.