From Adventure Motorcycle.com
The TKC80 is known for having both great off-road grip and a short rear-tire life. The TKC70’s are situated more toward a 70/30 or 80/20 tread pattern promising to yield much greater service life while not losing all off-road capability.
http://adventuremotorcycle.com/spotlight/news-archive/19-spotlight/news/679-continental-tkc70-test-report#.U-FEd-NdWbT
Not much is known of the new tyre yet, though it’s in testing by several magazines in the UK. Expect to see write up’s published in the next month or 2.
