I'll keep writing this until people understand: Benchmarks rarely, if ever, account for RAM. They are about speed. Back in my old MacBook Pro I upgraded from 2GB of RAM to 6GB. Geekbench results were the same. Was my system much more responsive switching between apps like CS4? You bet. Did it page that old spinning hard drive less? Yep. You need RAM to keep your tabs loaded and to quickly resume apps that are in the background. Benchmarks are about completing a set of tasks in a single app. iOS doesn't do much caching to NAND, and the NAND is much slower than a traditional SSD. Closer to the speed of a normal modern spinning hard drive, from what I've been able to gather.
RAM gives a better experience in actual use, CPU gives a better experience in actual use and in benchmarks. The A8 is quite capable and fast in performing calculations, not in loading or swapping content. CPU and RAM are two different things. It's like saying that a person who is fast but forgetful is just as talented as a person who is fast and can remember many things.