Part number issue, 1st vs 2nd design?

[BrizzoDaIzzo]

Im trying to order a new bumper for a newer body style  2019 Silverado. However, I’m coming up with some problems when I do a part search. The part I need is a new front bumper. The first part number is 84219085 (link) . The description on this part in the link is, “Bumper & mounting, without park assist, 1st design, chrome.”

 

however, there is another part that is 84588809 (link) The exact same descriptor and picture. Except this part is listed as “second design“. 
 

what in the world is the difference between “first design“ versus “second design”? Both of these bumpers are obviously for the new generation and not the Legacy truck, as those are listed on a separate part of the bumper pages and they look completely different than these. 
 

I am at a loss here on which one to order. First design versus second design. What’s the difference?

[hollywoodsle]

what's your vin

 

[BrizzoDaIzzo]

Already checked and both parts are listed as a “fit”. Weird