Two new scriptural citations have been added to a statement about the end times on page 151: Revelation 16:14 and 19:19-21.
The word "on" is now preferred to "upon".
The meaning of the Greek word rendered "baptize" is now given on page 175 as "dip under water" instead of just "dip".
"It if appears that you qualify for the public ministry" is now "If it appears that you qualify to participate in the witnessing work" on page 177 and "public ministry" on p. 177-178 is now "field ministry".
The phrase "being baptized" on p. 178-179, 182 is now more correctly "getting baptized".
Holy Photoshop, Batman! Four or five NWTs on page 180 were changed to rNWTs, but they forgot to update the appearance of the Bible Teach book itself, which is still gold.
The pictures on p. 184-185 are now color.
Lots more "come to know"s in place of "take in knowledge"s.
The sentence on p. 197 "So Jehovah can become whatever is needed in order to fulfill his purposes" now has the additional statement tacked on, "and he can cause to happen whatever is required with regard to his creation and the accomplishment of his purpose".
The material on the 2,520 years is completely unchanged.