If you have spy protection of say 50 ticks and a spy with infiltration of 500 ticks attacks will it protect you or will he get through due to infiltration? like my question is does your spy protection have to be higher than the spy's infiltration to protect you?

The enemy spy will succeed.

You need more protection than infiltration to beat it.

IF you have say the 50 spy protection, and they have 100 infiltration, after they use a spy option it will beat your protection and have it's 100 subtract 50 (protection) to a 50 then minus more for whichever operation he chose to do.

what if you have 1,000 spy infiltration, its YOUR spy, and an enemy has 2,000, while you have 2,001 spy protection? Who would win?