@UniverseIce claims to have received more information about the Galaxy Z Fold4, specifications of which leaked yesterday. Incidentally, specifications of the Galaxy Z Flip4 have also leaked, covered separately. However, @UniverseIce has detailed changes for the Galaxy Z Fold4's Under Panel Camera (UPC) that Yogesh Brar did not mention during his recent leak.
Specifically, @UniverseIce asserts that the UPC has 400 pixels, roughly 2.32x the density of the UPC in the Galaxy Z Fold3. According to @UniverseIce, 'particles' will still be visible in this year's Galaxy Z Fold4, but they imply that the UPC will be less visible than it is on the Galaxy Z Fold3.
Moreover, the same leaker has provided more comparisons between the Galaxy Z Fold3 and the Galaxy Z Fold4's alleged design. Writing on Twitter, @UniverseIce adds that the hinge design of the Galaxy Z Fold4 has changed a lot from the one in the Galaxy Z Fold3. As the image below shows, the leaker believes that the Galaxy Z Fold4 has a narrower hinge than its predecessor, which should make it easier to hold. Incidentally, Roland Quandt writes that the Galaxy Z Fold4 has already entered mass production, presumably in time for an autumn release.