Nope, because the cable in the uptowns also had a stupid little volume slider in it (with crappy PCB and channel imbalance) and was highly microphonic. Also, I'm highly sensitive to volume levels and I can guarantee you that I tested them to the same gain levels to A/B it (it was sighted and hence flawed, yes I know) and I did hear a better tonal balance.
I'm not disagreeing with you, just that it's not always that black and white
I'd say for the Takstars: yes. Perhaps a different sound, but not better. They already measure quite flat so not much improvement there. You might want to change the cable to make it detachable though.