If it's of any help, Trev I have just done this. I have 2 drives,one XP and one Win7, both latest 2018 507 but the Styles count was different. Win7 won with 6051 but I was nearly 100 down in XP.
So I created an Excel file, brought up the alphabetical Win7 style list which you can dump to Notepad and thence to Excel and then did the same with XP and dumped it following the Win7 one. Trimmed out the unecessary columns to keep important ones like name, date, Pack etc, then brought the XP set up alongside the Win7. Just scanning down, comparing Win7 vs XP and you can quickly spot the omissions. Or 'Sort' by Pack or date etc at will. Anything missing will quickly be obvious.
I'm sure clued-up Users have a shorter, more accurate way of auditing the two together but it worked for me.
HTH
Ian

Last edited by sixchannel; 12/20/17 02:31 AM.

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