'Off-White to White' comics with different grades? 1 1

[Harlequin22]

Hi - Hoping you all could shed some light on this question for me please.  I recently got back 2 CGC graded comics (X-Men #9 and X-Men #107).  Both had the same wording written under the grade number (Off-White to White pages), however #9 had a grade of 3.5 and #107 had a grade of 8.0.  Doesn't the written grade match with the number grade or are these 2 completely separate grading criteria? Thanks.

[CGC Mike]

Hello

The off white to white pages reflects on the page quality

https://www.cgccomics.com/grading/grading-scale/?scale=page-quality

The numerical grade reflects on the structural condition of the book.  

https://www.cgccomics.com/grading/grading-scale/

Mike

[Harlequin22]

Understood.  Thanks for the references.