Watch Dogs: Legion perhaps lacks the full RT spectacle of Insomniac's efforts but it does have its own plus points. Unlike Spider-Man, there are reflections within reflections, so the reflection of a puddle on the ground, for example, will show reflective properties. Also, the geometry in reflections looks to be the same level of detail and precision as those in the primary view - Miles Morales has a lower precision 'RT city' from which to draw its reflections. However Ubisoft's implementation also has plenty of similarities with the PS5 exclusive. Xbox Series S and X are using stochastic reflections much like Insomniac's tech, so they will technically produce more realistic surface reflections than other simpler types of ray tracing. Also, the ray traced reflections in Watch Dogs: Legion add to transparencies - so glass materials look very realistic. Put simply, it's a big upgrade from a visual perspective, especially for a cityscape rich in reflective surfaces.
For ray tracing, a checkerboard rendering approach is used for all systems - even PC - so what are effectively half resolution RT reflections on PC become quarter resolution on Series X, calculated at 1080p, reducing to 720p on Series S.