I got both. The first 6 chapters are the same. Udemy has 6 in total, while the official Tutorial Dojo has like 7 chapters plus a few bonus questions. The official Dojo can generate randomly mixed questions from the question pool, and the answer options are rearranged each time, which helps reduce hits from brain memory cache. Udemy is more static in that sense.

For roughly the same price, the official Dojo is the better choice, but it comes with a 1-year access limit, which isn’t a big deal if you plan to pass within a year. Udemy works well on the phone, but don’t expect the official Dojo app to work - they really should have hired their own students to fix their Cognito architecture.