'Use both here at the shop. 'Love Oracal because there's more colors to choose from but I have some rolls that has shrinked in the rack, about 1/16" on each roll ends, so that tells me it will shrink even more outside. 3M never showed similar issue. No big deal since I almost run on cast on every jobs... For cast, I also use both. 3M suck for "new colors" though...