When examining the cockpit windows of the B-2 and B-21, the differences are striking. A comparison image posted on social media by aviation enthusiast @thenewarea51 offers a clear view of these aircraft from similar angles and under similar lighting conditions. The B-21's cockpit glazing is notably different from the B-2's wraparound windscreen. The B-21 features angled slit windows, a stark departure from the B-2's design, which emphasizes side visibility and a broader field of view.

The design of the B-21's cockpit windows likely serves multiple purposes, with a strong emphasis on stealth. The narrow forward field of view, confined directly ahead of the aircraft, prioritizes vertical over horizontal visibility, which is essential for aerial refuelling—a critical capability for the B-21's long-range missions. This design choice suggests that low observability (stealth) took precedence over conventional visibility, especially considering the strategic importance of minimizing radar cross-section from the front and lower aspects.

B-2 Spirit

Development: The B-2 Spirit, developed by Northrop Grumman, was designed to penetrate deep into enemy territory and deliver both conventional and nuclear ordnance. It leveraged pioneering computer-aided design and manufacturing technologies to meet complex low-visibility requirements.

Design: The B-2 is a flying-wing aircraft with no fuselage or tail, contributing to its low radar cross-section. This design, reminiscent of earlier Northrop aircraft like the YB-35 and YB-49, allows for high aerodynamic efficiency and a large payload capacity. The B-2 can carry up to 40,000 lb (18,000 kg) of ordnance within its internal bomb bays.

B-21 Raider

Development: Initiated under the Long Range Strike Bomber (LRS-B) program in 2011, the B-21 Raider is being developed by Northrop Grumman following a competitive bidding process. The program emphasizes cost-effectiveness and rapid capability development, managed by the Air Force Rapid Capabilities Office.

Design: The B-21 Raider is described as a "sixth-generation" aircraft, emphasizing advanced stealth capabilities and networked sensor-shoot systems. Renderings suggest a smaller, lighter design compared to the B-2, with blended inlets and a two-wheel main landing gear. The B-21 is intended to function as an intelligence collection platform, battle manager, and interceptor in addition to its primary role as a bomber.

The U.S. Air Force's unveiling of the B-21 Raider has sparked considerable interest and comparison with its predecessor, the B-2 Spirit.