When it comes to BT speakers, the primary advantage of BT 5.x over 4.x is the increase in range. BT 5.x quadruples the range of BT 4.x allowing users to enjoy wireless audio over much longer distances. BT 5.x is also more power efficient than the outgoing standard making it last longer for extended listening sessions. BT 5.x is also backward-compatible with the outgoing 4.x standard making it compatible with a large set of devices. Therefore, investing in a device with BT 5.x is highly recommended.