LEGO - News from a Studded World

I volunteer to an org similar to that of The Make A Wish Foundation and we have a little boy who has asked for the UCCS Millennium Falcon.

I was asked to assist with this child’s wish as I myself am a LEGO collector.

My issue however is that when I was informed that this little boy wanted the UCCS Millennium Falcon (their request was emailed to me) I assumed it was a typo for the Lego UCS Millennium Falcon and so as such I promptly ordered set #75192. It was today after a brief discussion that I realized what they wanted was the BrickVault MOC of the millennium falcon at 12k~ pieces which I didn’t know was a thing until now.

Having discovered that I purchased their instructions.

This is where I need help because I am not familiar at all with bricklink outside of very basic use cases.

I have both parts lists and the set being delivered so what I am trying to do if it’s possible is to compare the 2 parts list to draft a 3rd list containing a list of parts that I need to purchase in order for this child to have everything they require to build the Brickvault UCCS MF.

I was initially going through the comparison line by line but I thought I would call upon the community who may know a better way because where I tried I failed but I attribute that to my lack of knowledge for the web application thus I was doing it line by line.

I apologize for this ask. I’m just trying to do my best to put a smile on a deserving kids face and would greatly appreciate any help.