Is there any difference between these sentences?
Whenever I see Graham, he's wearing a tracksuit.
Whenever I see Graham, he wears a tracksuit.
Also somewhat similar:
I like to listen to music when I drive
I like to listen to music when I'm driving
I was reading John Eastwood's "Oxford guide to English grammar". From page 82 he starts explaining the difference between the present simple and present continuous tenses and gives some examples but I was wondering whether in these examples the second variant of tense is possible and what it can possibly mean if it is.