In my DAW I have the option to set 8th notes as triplets or normal 8th notes and put the swing option @ 100%. From what I understand, the normal 8ths with the swing @ 100% is considered to be "swing" whereas the triplet option would be like "shuffle" right? The difference I can see is that when I use triplets the note is divided into 3 equal portions whereas if I use the 100% swing option the note is only divided into 2 portions but with one triplet note at the end of the beat. This is where the confusion comes in.
In music notation, how do you distinguish between them? As far as I can see, sheet music for songs that use either of them seem to have the little sign at the top of the page that says two 8th notes = 3 8th notes so how do you know if the piece/song is shuffle or swing?