I think the movement is the same B01 used in the Navitimer. The B01 movement packs in 70h power reserve, vertical clutch, column-wheel etc. When I stated "top notch", it was in the context of the sub US$10K price point for the watch. The Speedy 9900 caliber offers superior anti-magnetic capabilities and some other bells and whistles including the METAS certification. The Rolex 4130 is reliable, accurate, robust/well constructed and apparently easy to service. I am no watchmaker so I will defer to Al (et al) on a more detailed movement comparison.
My personal take is that I would not consider any of the movements so significantly superior to the other as to influence the purchasing decision.