... me, the introduction of the comparative reading passage made completing the ... has advice on tackling the comparative reading passage I would love ...
... has the obvious change of comparative passages, so you must take ... might have more difficulty with comparative reading, which could result in ...
Probably the main difference between "new" and "old" is the addition of comparative passages in RC. The free June 2007 is the beginning of such change. So anything PT's starting with Pt 52 (in addition to June 2007) has the comparative reading.
Also, the NY Times has something called "Room for Debate," where about 4-6 people weigh in on an issue from different angles. This is good practice for the comparative reading passages
The New York Times has a feature called "Room for Debate," which has about 4-5 essays written about a specific topic. This provides good practice for the comparative reading passage.