LPR setup help

I'm going to get a 7 series cam later, but for now I'm debating grabbing either the B58IR-Z4E S3 or the B54IR-ZE S3. I'm going to use it to test if I can grab plates at the T intersection I have, but will mainly be capturing people as they walk by on the sidewalk.

Hence, IR at night, color during the day. The plate capturing is basically a bonus if I can do it. If it works, like I'm hoping, then I'll either grab a 7 series or a dedicated ANPR.

Basically a $70 difference, but I'm leaning towards the 4k/8mp cam in hopes of getting better face captures. The sidewalk is approximately 50 feet from where the cam will be set.