just an one-off comment, mark_alec got an ass-kicking score for english last year, and i'm pretty damn sure he knows what he's talking about.
comparative analysis is analysis, not evaluation.
In analysis (science or humanities), it is analysing what, how and why. That is, what has been done, how was it done, and why it was done (to what effects).
evaluation, on the other hand, is how well it was done.
if evaluation were promoted in comparative analysis, a lot of people would unconsciously turn them into mini-POV as their attitudes towards that particular issue would impact how they evaluate: they ARE writing with vested interest.
I did that on my first practice, and got told off for doing it.
unless you can control how you do that really well, i'd strongly suggest against it.