How many Cowon's have you owned? Anyone who has owned a ton of Cowons will tell you that they all sound virtually the same. The exception would be the P1 and M, due to their weak battery life will have more power hungry components, but the sound signature will still be very similar. Add to this fact that Cowon carry arguably the widest array of DSPs seen on a DAP, if one does have a slightly wider soundstage or warmer presence or what not I'm sure with the right patience and knowledge they could subtly tweak the DSP to being in the same league. Point is Cowon do good sound, you should base decisions based on price and features more than worrying exactly about comparisons.
Anyway, someone needn't spend an additional $200 to compare, you could visit a store (such as Minidisc in Australia) and try them out and compare. I'm sure Advancedmp3players in the UK will stock both, those are just two stores I know off the top of my head, I'm sure many other places exist around the world to compare. Stateside you guys seem to have a better return policy also.