In my mind these are not spacesuit per se.
I see them more as light spelunking suits.
With all the action going on in this movie outside the ships they needed to make more praticable suits.
Nonetheless i would have prefered that instead of the FF blue tight suit there was a regular jumper, military looking suit bit like the gemini one but tighter.
The only thing i find weird that they dont even evoke the nostromo spacesuits just a bit.