45 min = 1,000-1,200 words. I'd just go with 4 per paragraph. For Mod A (which is the comparative one), you should have 3 concept-led paragraphs with both texts in them. You should be showing clearly how one text shapes the narrative of the other, and thus it would be better to show this comparison together.
You can do 2 or 3 paragraphs but structurally it should be
Concept / Topic Sentence
Context Sentence
Text 1 Technique/Example/Analysis
Text 2 Technique/Example/Analysis - how the first text shaped it or subverted it
Text 1 Technique/Example/Analysis
Text 2 Technique/Example/Analysis - how the first text shaped it or subverted it
Linking sentence
if you want an idea of a comparative, I did one in yr 11 got 19/20 and its in my notes and resources
hope this helps