AT the moment I only use these over the Westone 3 and E3X. I had previously the Triple Fi 10 Pro, the Shure e500 and I still own the Etys E4P/S and RE0.
I carry in the some pouch the Westone E3x and the Re252 and I constatntly pick up the RE252.
The RE252 are comfortable to my ears and they sound extremely well. I am sorry but to my ears both Westones have too much bass that may cover the detail that with the RE252 is crystal.