motherboards hp z820

Hi all

I have a hp z820 

The device's motherboard has been damaged.

I need to get a motherboard from ebay  or amazon ،But the motherboards have different parts number for different prices.....

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In another device that had a motherboard with a different part than the host's host, I noticed that the power supply of the two devices was the same and had the same voltage .....

What's the difference between this part number of the names?

1: https://www.ebay.com/itm/HP-Z820-Intel-LGA2011-DDR3-Motherboard-Desktop-Workstation-618266-002-708464-001-/232096491518

2: https://www.amazon.com/HP-Motherboard-WorkStation-618266-003-708610-001/dp/B01N2APJE3/ref=sr_1_2?s=electronics&ie=UTF8&qid=1511359107&sr=1-2&keywords=HP+Z820+Intel+LGA2011

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thank you...