The UM Pro 50s have the insane ability of changing my emotional temperature in a heartbeat.
Waking up at 5:30 am to do strength training prior to getting to the office was always a pitiful experience...until the Pro 50s entered my life. At the 3rd or 4th song i just want to dance, play guitar, drums, sing and hug everybody who passes by (that look quite asleep since they don't use Pro 50s
These babies have quenched my thirst for the SE846s.
I stayed loyal to the Shure SE420s for 4 years and to the UM3x for 4.5 years hence i don't see myself with any other earphones any time soon. Only thing i ask to my Pro 50s is to last.
I love my UM Pro 50s. I'm glad there is another person on this forum that enjoys it that much. Seeing as I own both Westone's TOTL UIEMs, I find it hard to find fault in either one. Both are extremely special to me and I own both of them. Just as you said, the 50s are amazing in that they amp up the life of the song. Its extremely hard not to get pumped when listening to them. The immense amount of rhythm and feel that it provides is so unreal. Its not to say that the W60s aren't that way either, which they very much are, they simply are not as "in your face" about its nature.
Listening to Suffer by Charlie Puth is so unreal out of both. On one hand, the 50s showcases the song's soulful nature and builds on it. The rhythm of all the notes and the smoothness of the instruments are extremely satisfying. If we were to take it as it is, the 50s color the sound to a great extent because of its "dark" nature. However, that cannot be taken away from the skill these IEMs provide. These build on the instruments that are there and builds on their qualities. Pulling everything excellent and unique about each one, showcasing them for the forefront of your ears.
While the same song running through the W60s are, in short, smooth and "cleaner". To expand this description, it keeps the same dark nature, or of similar basic sound, and expands upon the higher registers of sound. These are quite a joy to listen to. As stated prior, the W60s are not nearly as dark as the 50s. While it gives up a little of the forceful rhythm that the 50s grabs and drags you into, it provides air and openness. In a better description, the W60s' sound is one that surrounds you, creating a world the consumes your aural senses that allows you to fall into its sound, while the 50s drags the listener into audio bliss, regardless of if they want to or not.
They are powerful IEMs, and I'm glad I bought them. Surprisingly enough, I find myself using the W60s more now that I have them. However, I use my 50s extensively when I am singing and recording audio tracks. Its amazing on how much these little things can do compared to many larger competitor IEMs.