I can't really decide which one is best. I think from EP C/B EP to Gloss Drop their music stays somewhat consistent (you could argue GD has more filler) but the production quality got worse. The drum sound is way too compressed on Gloss Drop. Also sounds kinda sterile, like they recorded everything direct in.... the older stuff sounded more amplified, organic and live. Gloss Drop has less of a "live" feel. This is of course irrelevant if you see them play live. Therefore, everything I just said is meaningless.
I voted EP C / B EP