The question is based on what the two militaries are asked to do for their country and regional stabilization. The United States' job is to defend its borders and ports from terrorists and to stabilize governments abroad. Because the United States does not have an active and hostile enemy directly bordering it, the US extends its borders and port defense to Europe and the Middle East. The war on terror was an extension of border protection to ensure that more terrorists would not enter the borders and attack the United States. The United States' national defense constitutes defeating terrorists overseas because its natural borders are not hostile.
For Israel, its borders are directly hostile and to defend themselves from terrorist attacks they must actively defend their natural borders. Israel's job is to defend their nation from terrorists and enemy nations that have the potential to end the existence of the state of Israel.
Irrespective of the size of the two nation's armies, which nation does its job better? Does the United States or Israel better defend itself from terrorism? Is the American military or the Israeli military better equipped, more prepared, and more efficient at performing what its nation asks of it?
For Israel, its borders are directly hostile and to defend themselves from terrorist attacks they must actively defend their natural borders. Israel's job is to defend their nation from terrorists and enemy nations that have the potential to end the existence of the state of Israel.
Irrespective of the size of the two nation's armies, which nation does its job better? Does the United States or Israel better defend itself from terrorism? Is the American military or the Israeli military better equipped, more prepared, and more efficient at performing what its nation asks of it?