Cob Led question

Hey guys. I’m looking at the hortibloom Luna B4s on sale... what are the differences between citizen 1212 and citizen 1812? Also the crew 3070 and the 3590? Any help would be great thanks! Just finishing up my first grow and already looking for an upgrade!

The efficiency of the COB is the main difference. You will get more light out of a cree 3590 at 50w than you will a 1212 at the same wattage.
The 1812 is very close though and more cost effective.
Hard to find a better deal than hortibloom are offering