Well, those Denim Gallery jeans arrived from yoox today..
They're definitely Thanaz. I like them, only thing is they're literally 1cm+ shorter than 32" leg thanaz which(on me) seems to make a difference and they're borderline short. When worn with no shoes, they don't touch the floor at the heel of the foot. Will possibly post pics later.
Strange... DDG and Diesel Pants usually have a inseam range from a true-to-size 30" inseam for 26 waist and a 34" inseam for the biggest (is it 36 or 38?) waist. So your other Diesel pants are just in that range with a 33" inseam for a 34" waist.