not fair.

If you ask me: I would definitely recommend the Vsonic without a doubt. There's still room for improvement but I think Vsonic made an excellent job creating a good looking and decent sounding IEM for a good price.

The entire Sony XBA Line is stunning: very sensitive and well executed lines, comfortable despite size, flat cable, nice case, a 90'plug.
 
The first time I tried the Xba3 the sound wasn't appealing at all. Unnatural and spiky treble, (some people refers as metallic sound) and didn't cope well with my recordings. Nowadays I understand the praise and it has to do (IMO) with music genres: I find the xba-3 perfect for jazz recording, in fact I never hear anything closer in terms of overall satisfaction for Jazz, classical is also very enjoyable.
 
I decided to mod them, I used micropore tape to reduce a bit the treble, although they lost a bit of detail they sound better for me. 
 
My main source is an Iphone 4s. The sound is quite melodic in my opinion. 
The sound changes a lot using a laptop/ipod/mp3 player or amps.

Bass response doesn't bleed to the vocals or any other frequencies whatsoever, lightweight cable with no microphonics and a narrow plug to connect to portable devices. The Westone has a powerful, detailed and clear sound that does not under or overemphasize anything. A polite sound as another writer described with a mid-bass bump and upper treble elevation without been disturbing. A young-adult/athletic grown-up man sound if I have to describe it.
 
Westone star tips are excellent.

I don't consider them nice or even fun thinking about sound, but every time I'm working out I feel like I made a great investment. Going out with my Westone 4R or my customs make me feel paranoid to some extend. 
The Shure isolates incredibly well, just like an Etymotic without the (tips reaching my brain) sensation. I was amazed to see such an extraordinary achievement in a non-vented dynamic driver. I haven’t heard anything like it (leaving aside BA)
The Shure sound natural despite the treble attenuation, guitars sound more or less right but the bass bump is discouraging (not a bass heavy person) A proper description will be like a musician from a pop band: He might play like a pro but never will be at the center of the stage. 
I just hope to see more IEMs in a few years like this one. 

I noticed so much praise around here that my expectations were quite high and I gotta say: I was not disappointed at all. There's little new we can say about such a famous/infamous IEM. I bought a pair to reshell them and try customs so I can't comment about build quality. Not really a fan of V-shaped signatures but this one is special, some people can argue about the overwhelming bass hiding mid-details, but again, the TF10 are really wonderful! Highly recommend them!

I'm biased against on-ear headphones. For a daily commute I use in ear monitors and for listening sessions nothing beats over-the-ears counterparts. At work isolation is not such a problem (neither a good idea for my line of work to be fair) but I don't see why people still need the type of headphones that doesn't bring the best of both world, or at least a consensus. 
 
The active noise isolation IMO is more a gimmick because the on ear design doesn't provide a decent seal, so the noise canceling is useless.
 
To be continued.