For the three players mentioned (Burrell, Montgomery, and Green), the two giveaways for me are the signature licks, and the tone/articulation. I've read that Kenny uses a picking technique known as "circular picking", where the pick actually moves side to side in addition to up and down, which sorta makes a circle. It gives his phrases a loping sort of quality. As Dr J mentioned, Wes used his thumb in place of a pick, which gives his sound a warmer, softer quality. And of course, the octave and chord solos give him away. Grant often has a more staccato way of playing the notes, and has a lot of forward momentum in his solos. He was also fond of repeating a two or three note phrase sometimes for an entire chorus, creating rhythmic tension.