On the website Titleist states:
"T250•U is specifically designed for higher launch, effortless carry, and optimized for use with high-performing graphite hybrid shafts, providing greater versatility as a driving iron compared to a standard T250 iron."
Does this just mean a lower CG, or did they put another type of clubface in? Loft is identical.
Another difference seems to be that the U is suited for parallel tipped shafts,
In the T200 the set 2 iron was said to be lighter to compensate for the steel shafts, maybe that's the case with the T250 too?