The primary difference between the Boeing 777-300 (the "Classic") and the 777-300ER (Extended Range) lies in their range, engines, and physical wing design. While both aircraft share the same fuselage length, the 300ER is a much more capable long-haul machine. It features significantly larger fuel tanks and a higher maximum takeoff weight, allowing it to fly nearly 7,370 nautical miles compared to the roughly 6,000 nautical miles of the standard -300. Visually, the 300ER is easily identified by its "raked" (slanted) wingtips, which improve aerodynamic efficiency, whereas the standard -300 has traditional blunt wingtips. Furthermore, the 300ER is exclusively powered by the massive General Electric GE90-115B engine, the most powerful jet engine in the world at its launch, while the classic -300 used a variety of engines from different manufacturers. For Emirates, the 777-300ER became the backbone of its long-haul fleet, while the original -300 models have largely been retired or replaced by these more efficient and longer-ranging variants.