Basically what the title says, mainly for Text Response but also for Context. Is it true that some texts are more 'complex' and therefore are likely to lead to higher marks for the depth of your discussion? Is it just better to pick the ones you most recently studied?
I've studied Burial Rites and All About Eve; and Death of a Salesman and Foe if anyone can comment specifically on those texts. Thanks 
Honestly, it's a bit dependent on how well you perform in English. There are some people who will do well regardless of which text they choose, so they should just go with the one they have the best ideas on; others are quite weak, so should avoid a more complex text because it exposes all their weaknesses and they can't do it justice - they tend to do better on a text with a lower bar for entry. Other people are good enough to tackle a complex text, and the text gives them the push they need.
Burial Rites has twenty million authorial techniques (too much reliance on metaphor and symbol and simile and narrative techniques etc, actually, and they make it a clear "first novel") - but that means you have a lot of authorial technique evidence to use, and that reads well on the exam. All About Eve has more straightforward thematic arguments (less complex in that regard), but students who are good at analysing visual techniques have good material. Death of a Salesman has been done so much it's almost a cliche in its own right; Foe is much more difficult to analyse (if you look at the layers with the original text and the final five pages) - but there are ways to reduce it to a simplistic argument ("some versions of the truth can be omitted" etc).