I'm sure both still exist. Slang always is prone to regionalisms and in-group markings. What I've heard (on Xbox voice chat primarily) as commonly used today is

I'm sure both still exist. Slang always is prone to regionalisms and in-group markings. What I've heard (on Xbox voice chat primarily) as commonly used today is "bruh" like much closer to how most people pronounce "duh". I don't know where it originates dialectally other than "often heard in Fortnite and Minecraft". (Definitely the one closer to my youth came closer to "bra"/"brah", and while some of that was assumed to be surfer-originated, I can't tell you how much it was related to Hawaiian pigdin or just convergent evolutionary vowel shifts.)