Lots. Let’s break it down:More power: Hel 2E is rated at 1200mW into 32 ohms, 20% more than Hel.More connectivity: Hel 2E adds an optical input, so you can connect it to any TV with an optical output.More compatibility: Hel 2E has built-in UAC2/1 switching, which means it’s now compatible with manygaming consoles like Sony PS4, PS5, and Switch.More modernity: Hel 2E uses USB-C connectors, rather than Hel’s USB-micro.More quality: Hel 2E offers lower noise and distortion than Hel.