So 4 books by Srila Prabhupada and their revised versions have been compared in the 4 links below. Please have a look in detail at each of these. Some interesting differences:

1. They have removed many verse references in revised editions.

2. They have put their new edition translations for select verses.

3. They have clipped quite a lot of small content in between and have inserted their own sentences.

4. In POY, they have changed the order of chapters

In these PDFs, the year of revised editions is mentioned.

1. On the way to KrsnaLink:https://documentcloud.adobe.com/link/track?uri=urn:aaid:scds:US:53834992-8735-4857-ba72-4c4f69e2f0b1

2. Beyond Birth & DeathLink:https://documentcloud.adobe.com/link/track?uri=urn:aaid:scds:US:92b46e6b-fc3b-4d22-b215-4fb9bfd58739

3. Rāja-Vidyā:  The King  of KnowledgeLink:https://documentcloud.adobe.com/link/track?uri=urn:aaid:scds:US:252bd5db-6c77-4390-a4ff-c0338af19e21

4. The Perfection of YogaLink:https://documentcloud.adobe.com/link/track?uri=urn:aaid:scds:US:f3796fde-9e74-4a15-b23f-d2dfd95192bc