So got the x10's today. Comparing to the TFI10's...
Initial impressions on the x10s are very positive.
The sound signature is very consumer oriented imo, very safe, warm, good emphasis on bass, mids and so so on the trebles. The vocals are warm to the human ear, what you would expect for a comfortable listening. Not very analytical at all, but extremely comfortable sound signature. It does not tire you, it just is flowing very mellow, soft, expected. Actual physical comfort is really amazing. They kinda disappear on your ears, and after a while you don't even know they exist. The soundstage is deep, I mean I feel like the bass (drums and base) is like deep in the stage (just like the actual positions in the concert) but you can not extremely easily distinguish their existence. They just exist but what they do, how clear they sound, is not easy to make up.
The TFi's on the other hand, compared to the x10's are not comfortable at all in the ear. They stick out like goggles, and they don't necessarily stay in place (i found out when i move a lot they tend to pop out easily). They are not tiring but is not easy to use at all times (can not really imagine walking with them without them getting off my ears). Sound signature on the other hand is a lot more exciting than the x10s. It is extremely detailed. You can actually hear the distortion of the base string, which kinda amused me when I realized how much detail they bring out. The drumsticks hitting and bouncing, so much detail. Listening to GNR Chinese Democracy songs where 3 guitars are present, 2 rhythm and 1 lead, you can actually pick each and every one of them. It is extremely detailed, you feel like you are in a studio, recording the tunes. The base is very clear, punctual, real. But this kind of sound signature is definitely not for the mainstream crowd. It is not fun at all, very direct, very analytical.
I am planning on keeping both. I will find use for both somehow. X10s don't inspire in build quality, they seem to be flimsy and needs to be babied. If had the intention to return one, I would return the TFI10's just because of the fit issues, not the sound. The hard to fit and hard to stay issue kinda limits the use abilities.