The Datejust 36 and Datejust 41 share almost everything except size: same caliber, same bezel, same bracelet, same certification. It's one of the simplest comparisons in Rolex's catalog precisely because there's almost nothing technical left to decide — the choice is about proportion, not performance.
Both references run Calibre 3235, Rolex's in-house movement, with ~70 hours of power reserve and Superlative Chronometer certification. Neither one beats the other on accuracy or autonomy: the engine is identical.
The fluted 18k white gold bezel, the 5-link Jubilee bracelet, the Cyclops lens over the date, and the 100m water resistance are identical across both references. The case material matches too: combined steel and white gold (Rolesor) on both.
5mm of diameter is the one variable that genuinely separates these two references. The Datejust 36 keeps the model's historic proportion dating back to 1945; the Datejust 41, introduced in 2009, answers the preference for larger cases in Rolex's contemporary sport-elegant catalog.
There's no technical decision to make here: caliber, certification, bezel, bracelet, and water resistance are identical. Pick the 36mm if you prefer the Datejust's classic original proportion, and the 41mm if you want a wrist presence more in line with the rest of Rolex's current sport catalog. Neither has verified market price data in Cazador yet.