@MassiveThighs I’d size down. I’ve a pair of OG 634-S Indigo which I’ve had about eight years in a 30” waist. When I bought a pair of the Black Overdyed last year, I needed to size down to a 29”, and they are basically the same size all over / cut.

There's some info a lot earlier on in the thread about the differences between Indigo and Black Overdyed sizing. Hope this helps.