I had to comment on Shure E500 vs Westone UM2.
All these universal IEM do changes its sound signature dramatically when using different tips.
Shure E500 sounds the most boring if using the grey silicon tips. It does everything in a balanced way, and therefore, just like some people said it got detail, but it can not get my foottapping.
With the clear silicon tips, the treble and bass got a bit emphasised, but again this does not get my foottapping.
With tri-flange, amazing thing happens, the mid range got a huge bump, and bass tighten and has attacking power, and the treble sibilence that I have experienced with other tips are gone, and even with treble boost, there is no treble sibilence.
All these above happened to Westone UM2, but Shure E500 just does everything better in my opinion.
In the end after some tuning with my Shure E500, I can have the same forward sound of Westone UM2 and close to UE10 Pro detail out of my iPod. In the end, I had to give up on UM2 because the bass bothers me a lot. Its bass is too loose for my taste.
Please do note that because the different shape of earcanal, different people might experience slightly different sound signature than me when they changed the tips.