>>91
The actual clock speed is only a part of the equation, the other part is the actual design of the architecture(RISC vs CISC and so on) and how many clocks each instruction takes. If you believe that those CPUs are equivalent, I dare you to try running some DS games with the same speed on your 486.
You won't be able to, even with a decent dynarec engine
Also, compare the power consumption of a 486+said RAM vs the DS's hardware.