No, the Boeing 737-800 and the 737 MAX 8 are different generations of the same aircraft family. The 737-800 is part of the Next Generation (NG) series, which was the third iteration of the 737, while the 737 MAX is the fourth and newest generation. The most visible differences in 2026 are the winglets and the engines. The 737-800 usually has "blended" wingtips that curve upward, whereas the MAX features distinctive "Split-Scimitar" or "Advanced Technology" winglets that point both up and down. The MAX is powered by larger, more fuel-efficient LEAP-1B engines that have "chevron" (serrated) edges on the back to reduce noise. Internally, the MAX features the "Boeing Sky Interior" as standard and updated flight deck displays. Most significantly, the MAX was designed with the MCAS software, which was absent in the 737-800; following the well-documented grounding, the MAX has been extensively updated with redundant sensors and new training protocols. While they share the same basic fuselage shape, the MAX is roughly 15–20% more fuel-efficient and has a longer flight range than the older -800 model.