Yes they notice, but there's so many of you at stage 1, they can't remember all the names and who was wearing what that day.
Stage 1 is all about psychometric/motivation paper. Nothing about how you dress. Stage 2 and 3 is where it matters as there are so few of you, they'll remember this time.
As much as I like to put in the effort
The smarter I dress the smarter I feel. Geddit?! hahahaha
I'll stop now.