Logitech unifying receiver and Bluetooth have their own benefits and drawbacks. The unifying receiver can be used with 6 devices at a time while working with multiple vendors through Bluetooth is challenging. Also, device latency is less for Logitech unifying receiver than Bluetooth. On the other hand, the unifying receiver supports only those devices that Logitech manufactures. But Bluetooth supports a wide range of peripherals. Considering the pros and cons, choosing any of them completely depends on your preferences.