This is a question that probably well suits my handle.
To me the biggest difference in sound between Django and the rest is the effortless yet authoritative way he strung notes together. It seemed like no matter how fast he played, each note was well articulated. When the other players play fast you can tell that they're really trying hard for speed and don't manage to instill that necessary urgency into each note. When listening, the most appropriate metaphor for this phenomenon seems to be dancing -- Django's hand just danced up and down the fretboard.
I thought this image of dancing might be because Django only played with two fingers (two legs) -- John Jorgenson got some of same quality in his two-fingered mimicry of Django -- but then I heard Oscar Aleman and he has that same effortless yet dynamic style of stringing notes together.
My words naturally fail to describe what my ears hear. Can anyone understand what I'm getting at and if so, is there any objective technical explanation for why Django and Oscar have this quality in their playing?