Hello everyone,
I am new to this forum but the topic is too interesting to pass. Hehe...in my opinion the 2 are not comparable. The U1 is a simple ETA2824-2 automatic, unique look but nothing special with when it comes to the movement. The UX on the other hand while it is a quartz, is perhaps the last few quartz watches offered with ETA Thermocompensated quartz from European stables. These are unlike the normal cheap pedestrian quartz. They are designed and built for extreme high accuracy. It is common to hear that thermocompensated quartz drift lest then 5 seconds per year. The downside of the milspec UX is the oil filled case which requires sending the watch to Frankfurt for batt replacement every 7-8 years. I'd choose the UX over the U1 on any day although I keep both autos as well as quartz watches.
Cheers!