The Montgomery GI Bill or MGIB-AD (Active Duty)
Below you will see the nice long 64 page pamphlet the VA has to explain chapter 30 education benefits.
The big difference between the education benefits of Chapter 30 and Chapter 33 is simply the difference in payments. Chapter 30 essentially gives you a flat monthly allowance. As of October 1 2017 that rate was $1928. However, that rate is all you receive. For example, chapter 33 gives you a tuition payment, stipend and a book allowance. While 30 merely gives you the stipend.