Which logic board did i get?

Well, i caused the damage nobody wants to cause with their Macbook Pro. a usb mouse connector cracked the logic board! I was told by the service shop to make sure to get the model 661-4956 and not the older version 661-4341. I just got it but when i look up some of the numbers on the board, i only find hits for the 4341 board. So the question is, how can I tell the difference?
The only real helpful number i an see is the number 820-2101-A. That is the number that i get hits back for the 661-4341 board. I can't seem to find any good pictures of either board to really find out for sure.
The only other numbers i see are on a bar code on the RAM connector. If any of those numbers would help, i can add them also.
But if there is anyone out there who knows how to tell these apart or what the difference is, i'd greatly appreciate it! Should i even be worried about it?
Thank you!

jjonesr5:
Welcome to Apple Discussions.
It will be helpful if you identified your computer more closely: processor speed, year of purchase etc.
cornelius

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