The Arctis Pro does sound a bit better than the 3. It has a fuller bass to it, and a touch more clarity throughout the range. However, honestly, it’s not worth the large price premium unless you really need to have the absolute best that Steelseries offers. I think the Arctis 3 is exceptional for 99 percent of listeners.
Right now, the Arctis 3 Bluetooth is selling for just $99 dollars on the Steelseries web site. Also, it doesn’t seem like it’s getting an update for 2019 alongside the other standard Arctis models, which is a real shame. Hopefully it just hasn’t been announced yet! I always expected that the Arctis 3 Bluetooth would get a full retail release, and not be stuck as an online-only thing. I’m sad that never happened.