It grew to become the main flagship product for Audemars Piguet, although many had their own doubts about the watch due to its design. It set a precedent for most watch companies to follow. The business launched a Royal Oak spin-off on its birthday, to celebrate the achievement of the Royal Oak. Both are tough to tell apart, judging by it the same layout and features. In this article, we outline the differences featuring some of the pieces. The gaps between the Royal Oak and the Offshore are more subtle but apparent — mainly about the dimensions, a little on dial patterns, and also on the chronographs. Specifics of the Audemars Piguet Royal Oak / Picture from Audemars Piguet Size. The Royal Oak Offshore is larger than the Royal Oak from 1mm — the Offshore features a 42mm case, although the Royal Oak has 41mm. Style Profile. Due to the size differences between the Royal Oak and the Royal Oak Offshore, the latter’s design is more sporty-robust, compared to the elegant-classic Appearance of the Royal Oak. Dial. To the uninitiated, the dials of the Royal Oak and the Offshore may seem the same, but there are in fact slight differences. The Royal Oak features squares or’tapisserie’ on the dial, also called the Grande Tapisserie. The Offshore sports squares that were bigger, known as the Mega Tapisserie pattern.Chronographs.We have collated a few of our bits from each collection under to illustrate further.