I'm guessing you're asking about speaker cables*, so the question of adjustable impedance-matching does not come up.
Oracle V2 was an excellent speaker cable, but V2.1 is more open, has a more articulate bottom end with better pitch definition, and has better over-all soundstaging and holography.
* MIT never made an interconnect called "Oracle V2." The model prior to Oracle V2.1 interconnect was called 350 Oracle.
Hope this helps. Best, Joe