On the New UX the default column width for row labels displays differently compared to the classic module view. This can lead to a row label on a column displaying fully on a module view but when created as a grid on the New UX it can sometimes cut the text, requiring manual adjustment of the width.
Example below:


As you can see "TESTLONGNAMETESTLONGNAME" has been cut on the new UX. The row label width needs to be set as both default views display a different number of characters.
If both views have parity then this will prevent users from needing to manually adjust the width for row labels on the New UX.