The comparison between M3 and M4 MacBook Air shows the new M4 chip as a standout feature, with a lower starting price making it a compelling option.Design and display aspects of both models remain similar, with the M4 introducing a new sky blue color option.The M4 MacBook Air features the upgraded M4 chip with better performance and efficiency compared to the M3 model.The M4 chip has a 10-core CPU, 16-core Neural Engine, and increased memory configurations for enhanced productivity.The M4 MacBook Air's performance is significantly improved, offering up to 4.7x faster speed than Intel-powered models.With a 12MP Center Stage camera, the M4 model offers improved video call quality and Desk View support for various applications.The M4 MacBook Air starts at a lower price of $999, making it an attractive option with additional features and performance upgrades.Despite minor yearly enhancements, the new M4 MacBook Air presents a good value proposition for those considering an upgrade.Owners of M3 or M2 MacBook Airs might find little reason to switch to the M4 model unless coming from an Intel-based MacBook.Overall, the M4 MacBook Air maintains its predecessor's key features while offering improved performance and value for users.