damn that's cd seems like a must buy
not really side by side comparison so do not take this in serious manner, the larger air chamber compare to the original in entry level prestige series, i think the new one sounds more airy and less compressed/pressurize bass from the original, that's what i found very noticeable directly from dap when i heard sr60e but i think they are also tuning it little bit different, i also not really sure if it's significantly better or might even if it's an improvement. besides after spending some times with modding in the original, i actually prefer the look of the original, it's look very classic
and it doesn't matter though larger chamber or not, i almost certain the drivers tuned little bit different. and at some point you're going to mod the headphone anyway. if you like the looks of the original, you should go for it.