These two are of course completely different watches, and one of those differences is the weight. The Sinn U1P in tegmented submarine steel comes in at 225g on bracelet. The EZM1 in bead blasted titanium is only 72g on bracelet. Huge difference.
Even though I was having issues with the weight of the U1P on bracelet early on, I wore it mostly on bracelet during my vacation on the beach recently and had no issues. I'm thinking it was due to my nerve problem flaring up.
What makes the U1 Professional wearable for its weight is the case design. It is 44mm wide, but pretty flat feeling due to the wide and flat caseback. It is 14mm tall. The EZM1 is 16mm tall, and has a slightly more rounded caseback that makes it sit kind of tall. The height is usually no problem while wearing it because of how light weight it is.
The first time I un-boxed an EZM1 I was worried that it was too light, like there was a problem or the movement was missing

U1 Professional

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EZM1

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Together:

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