My basic take on the relation of Difference and Repetition and A Thousand Plateaus is that the virtual - actual distinction of DR seems to disappear in ATP with only the intensive left. The plane of consistency and the strata are both limits of tendencies of intensive processes which tend toward virtuality as complete capacity to form assemblages and strata as complete inability. But those limits are never reached: all rhizomes / planes of consistency have tendencies to form strata and all strata have tendencies to destratify.
Alistair Welchman has a good essay on these notions in Symposium (2009), "Deleuze's post-critical metaphysics." There's also a discussion by Alberto Toscano in his Theatre of Production (Palgrave, 2006).