I find this chart a bit obscure also, but seems to be arranged in tiers - levels- that are then listed in order of performance. The value is that it's possible to see results in groups of similar performance and compare Intel to AMD. It appears that no AMD is in the top tier with the best Intel.
A chart that seems a bit easier to make comparisons is the Passmark CPU Benchmarks list. You can search by name, organize 1,700+ CPU's by name, rank, price, and very usefully by cost / performance ratio >
For ratings / hierarchy of any CPU you can select from the Tom's performance grouping -are you after "top tier", "middle of the road", or "just whatever works" performance, and then search the Passmark list for relative performance, price, and cost / performance ratio >
I had a quick look at A-series AMD and the best performing A10 is the A10-6800K (APU),($150) inexpensive but ranked No. 180, whereas an i5-3570K ($220) is No. 98- and has a 33% advantage. And the range of motherboards for the i5 is excellent. If this is for overclocking / gaming, and you don't have to squeeze the price to the absolute minimum , an i5 will be the better choice and the 3570K seems to be the hot ticket.