They’re close: both forged, both in the same Model Y fitments and 255/45R19 and 285/40R19 sizes. The UP-05 is a Y-spoke design; the 19-inch UP-03 package is a monoblock with a different, cleaner spoke pattern. Strength and weight are in the same league. This is a styling decision more than a performance one, so pick the spoke design you like better.
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