If your modules question asks for two texts only, it is best to highlight the concept you are talking about in each paragraph and then talk about your two texts in conjunction with each other.
However, for the AOS where some people will be talking about up to 4 texts (2 poems from the prescribed anthology, and two supplementary texts), I would really recommend talking about all texts separately, "linked" by certain linking sentences or paragraphs which discuss texts in conjunction. This is because talking about four texts will become exceedingly convoluted, and what you often get is a poorly structured mess.
Of course, I can't say that my opinion is the right one. But my teacher has been a HSC marker for many years, and she advised this... so has my tutor, who actually teaches teachers how to mark the AOS at the HSC marking centres. So yes, they've had a large impact on my approach to AOS.