T420 Power Supply Variants

Hello Team,

Currently I'm building a T420 up and have acquired two 1100W redundant hot swap PSUs from third party sellers. The 1100W units appear to have many Dell part numbers (GDPF3 / 7NF52 / CC6WF / GYH9V / 0YT39Y / YT39Y etc.) and it is not clear why there are so many P/N's or what the differences are.

I have a 0GYH9V and an 0YT39Y. Both seem to have identical power specs and dimensions and only very minor aesthetic differences externally. My main concern is the contact tabs on the back that recess into the PD backplane are different between the two. Again, only very slightly but my concern was whether the division of the contacts delineated a change in pinout or power rails. The tabs are quite wide, as are the contact pins inside the K501P backplane. Every data sheet and online resource I've found so far says they are interchangeable and compatible provided the wattage ratings between the two units are paired (1100w + 1100w etc).

Will these work together?