You cannot go by lumens. LED's with much higer lumen count may not be as bright as traditional incandescents.
LED's have high lumen count, but the light is VERY directional - the workaround is to make the LED bulb with LOTS of led modules around the bulb to get the type of universal throw lighting that you get with incandescents. (The other factor is much of the incandescents light comes from the reflector lens and the light hitting it. LED's typically have a projector lens for the light going forward and a few LED's on the side for hitting the reflector.
Generally - LED's will be a bit brighter with probably a bit more throw and incadescents will have a bit more scatter. (I.e. - for reverse lights - LED's will show you further behind the car, and incandescents will show more to the sides but not as far.). I don't have a rear view camera, but most cameras don't do well in low light, so anything that helps light output can probably only help the camera.) -
http://www.corollaforum.com/showpost.php?p=17241&postcount=8 - That's on a Corolla, but look especially at how much difference LED license lights help the camera image and how little LED reverse lights really helped.
Those look like good LED's to me.
I've replaced the license plate, dome, and trunk lights (same seller as the OP) and the HMSL and reverse lights with LED's. Generally the LED output is SLIGHTLY better than OEM - but the light is a much bluer/whiter (non-yellow) white. Makes the car look newer ...