There aren't that many major manufacturers left.
Gray base = often Ritek. Usually good quality.
"OPEN / LOCK" in serif font (occasionally + tall upper lip) = most likely CMC. Usually good quality.
Rough base = Moser Baer India. Not necessarily my favourite.
Taiyo Yuden has a distinctive cake box type (as described in the FAQ) but similar cakeboxes are also used by some competitors such as Platinum/Tevion (BestMedia) that sell all kinds of stuff that can be had for cheap on the spot market.