Heyy! You can group them if they have similar techniques and then talk about the differing effect of each author's technique like you said
Or you could just dedicate one paragraph to talking about one author's piece and another paragraph for the other author. But you'd have to write it in a way that you're showing the contrast between what each author has written or mentioned in their piece - i.e. you don't want it to look like you're writing a separate lang analysis for the two pieces - they should kind of be intertwined and refer to each other

If your authors for the 2 articles were for e.g. Andrew Bolt and Helen Razer (the lady who wrote the annoying tattoo lang analysis in 2011!), You could do this by using phrases like: "Unlike Razer's emphatic attitude on bla bla, Bolt utilises *technique* to attack bla bla for their incompetence in bla bla" or "Like Bolt, Razer employs emotive and almost hyperbolic language such as bla bla to emphasise the large scale impact of bla bla issue". So words like "Unlike", "Similarly to", "Conversely", "Contrastingly", "In line with", "Opposingly" all kind of show the difference or similarity (and thus compare) the authors views

Sorry for so many bla blas!
Just do what's easier for you

Usually in the exam, you'll have to analyse an article/text with an image or stylistic elements (depending on what form you get for the LA piece) and this sort of larger and extensive two-article comparative language analysis won't really be given in an exam situation I think, as it'd take way too much time
