Yes, the communications chipset on the Nano 33 BLE can be both a BLE and Bluetooth® client and host device. Something pretty unique in the world of microcontroller platforms.
But what is the difference between them? Well, BLE is optimized for low power use at low data rates, and was designed to operate from simple lithium coin cell batteries.
If you want to see how easy it is to create a Bluetooth® central or a peripheral device, explore the examples at our ArduinoBLE library.