Hi Yohan7,
Indeed the three products are sometimes confusing. Here is an article which I think may be helpful:
https://e-gmat.com/blogs/official-gmat-practice-questions/As mentioned above, the Official Practice Question pack is the most expensive on a $ per question basis. So I'd suggest to only purchase it after you've exhausted all the questions from the Main OG and the OG DI review, as official/high quality DI questions are in short supply.
I don't think you'll need the Official Practice Question packs for Quant and Verbal. Due to the long history of these two sections, there are hundreds, if not thousands, of official questions from old OG/old practice tests that are available for free on GMAT Club and are still applicable to the current GMAT version.
Yohan7
I've already covered the 150-200 DI questions in the core OG and am looking for additional questions. What's the difference between these two products?- GMAT Official Guide Data Insights Review 2025-2026: eBook & Online Question Bank: Explicitly specifies that Qs are different from core OG
- GMATTM Official Practice Questions - Data Insights: esn't explicitly specify that Qs are different, but should be implied
I'm not clear why these are separate books in the first place, or whether the second book is a subset of the first?These same options exist for Quant and Verbal as well.
Edit: This is my first post so I'm not allowed to post URLs.