The Keisei Skyliner is quicker and sometimes cheaper. But does not serve central Tokyo stations such Shinjuku. It's a private railway, so a JR pass is not valid. The Narita Express is slower and less frequent.

Yes, the Keisei Skyliner is technically faster than the JR Narita Express (N'EX) when traveling from Narita International Airport to central Tokyo. The Skyliner operates on the Narita Sky Access Line and reaches speeds of up to 160 km/h, delivering passengers to Nippori Station in about 36 minutes and Ueno Station in 41 minutes. In contrast, the Narita Express usually takes about 53 to 60 minutes to reach Tokyo Station. However, "fastest" depends on your final destination. The Narita Express is often more convenient if you are staying in Shinjuku, Shibuya, or Yokohama, as it provides direct service to those major hubs without requiring a transfer. The Skyliner is the superior choice if you are staying in the Ueno/Asakusa area or if you plan to transfer to the Yamanote Line at Nippori. Additionally, while the Skyliner is faster, the Narita Express is fully covered by the Japan Rail Pass, making it the "cheaper" high-speed option for many tourists.