HF does this often where they have two or more seemingly identical products with different item numbers. I think it’s a matter of different suppliers making the same things for them.
Without looking at the actual items ^ that sounds about right.. some might be made from different places - china vs Taiwan for instance.. maybe not with the compressors, but with some other things - yes..
It's like going on alibaba and places selling the exact same **** from two different plants out of the pollution capital of the world.