What, if any, is the difference I should see between these two cameras?

https://www.mcmelectronics.com/product/82-11350

https://www.mcmelectronics.com/product/82-11355

the 3.6mm will give you a lot wide view then the 6mm, also the 6mm has twice the IR LEDs so it will give a better picture in the dark.

3.6mm @ 20 feet field of view = 27'W x 21'H

6mm @ 20 feet field of view = 8'W x 6'H

Plus you will need stronger PWS for 6mm camera then for 3,5mm cause twice as much LEDs compare to each other.

The lens has nothing to do with the power supply. It is true the more LEDs on a camera it will draw more current, but remember not all cameras have Leds. You can have a camera with a 3.5mm lens and one with a 12mm lens it will draw the same current.

Alright. Thanks guys.

Anthony,
I was talking about those 2 that he asked for. I know that there are cameras without LEDs. But thanks anyway.

https://www.discount-security-cameras.net/security-camera-lens-faq.aspx


check here.