1. If you mean a MIDI guitar part, variation can be edited and controlled in the stylemaker. If you mean a RealTrack, then you are listening to a live recording of snippets and I don't think you can make multiple measures play exactly the same way. You could try repeating the chord each measure and see if that helps. You could also go into RealBand or another sequencer software and copy a pattern you like to other measures.

2. You can see substyle A by a blue marker at the measure number, and B by a green marker. If you mean, what differences will you hear, then it depends. In most styles, the B substyle is 'busier'. Some styles might have the bass play in 2 for the A part and switch to a walking bass for the B part, for example. However, you have to audition the styles to know how the A and B parts differ for each style.

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