Copying workbook to a different MS Office version causes misalignment. In such conditions you have to use the Paste special option.

i would do as ArviLaanemets suggested, the safest way to keep all formulas and formatting the same, especially in a multi worksheet workbook.

it is possible to select all sheets, right click on the worksheet tab, move or copy, tick create a copy and select new book.

But there isnt look of difference between the 2