Given the differences between platforms up until now, it's unexpected to see the A10s separated by almost 30 seconds. However, it appears that AMD's latest APU matches the Core i3-3220.
Only a few seconds of difference distinguish the contenders in 7-Zip, though the A10-6800K claims a technical victory in this benchmark.
Intel's Core i3-3220 wins in our CPU-oriented compression test. Enabling OpenCL hands the win to AMD's A10-6800K. And the EZ test, which maximizes compression, also favors the Richland-based chip.