LoL… Really?
1 number apart, but considerably different. Sure.
Difference between x5 and x7 maybe. To pass x6 a device must be submerged to a depth of 1m for 30 minutes.
IPx7 is for a device intended to operate permanently submerged. So not a phone.
That fact your picking the difference shows you don’t know the difference.
IP67 is just a marketing gimmick. I’d be impressed if a phone with this rating would endure 12 months submerged and still function. Who needs this anyway?
Still using the buds I got with my galaxy S4. They’ve outlasted 4 sets of BT buds.