PCMark 7 does not support OpenCL so as a result, the A10-7850K is slower than the A10-6800K. With this test, you can get a sense that under the worst case scenario, the A10-7850K would give about 90% of the performance of the A10-6800K.
The latest PCMark 8 adds support for OpenCL. Thus, A10-7850K performs much better here. There is 6% improvement in the Work, 20% in Creative, and 30% in the Home benchmark.