Due to its superior military capabilities, the US' window of opportunity for striking Iran is much wider than Israel's.

Text source:Bibi, Obama have lost it - Israel Opinion, Ynetnews

Due to its superior military capabilities, the US' window of opportunity for striking Iran is much wider than Israeli window of opportunity.
I have changed the structure here to get your comments.

From my point of view that neither are incorrect since the point is possessive but the first one is the short form for possessive. Correct me!