I've worn fit underwear for men from expensive international brands and from modest local ones, and the honest conclusion is that the brand name on the waistband tells you far less than how the pair actually fits your body. A well-fitted pair from a brand you've never heard of beats a poorly fitted pair from a premium label every single time. Fit is personal, it's physical, and it's the variable that determines whether any underwear actually works for you regardless of what it costs or who made it.
What I think blokes should prioritise above brand prestige when choosing fit underwear for men is the combination of waist measurement and cut proportions. 2 pairs labelled the same size in different cuts sit completely differently. A brief labelled M fits very differently to a trunk labelled M from the same brand. Understanding your actual measurements and trying different cuts within your size range is more useful than brand loyalty has ever been.
A bloke I know was convinced that his discomfort was a body issue rather than a fit issue. He assumed he was just an awkward size to fit. When I pointed him toward Barramundies and suggested he try a different cut from his usual, the fit underwear for men experience completely changed. The discomfort resolved immediately. His body wasn't the problem. The cut he'd been wearing for years was wrong for his proportions. Barramundies got the fit right.
From my experience, fit underwear for men that genuinely fits your specific body is worth more than any premium brand name. Barramundies has built their sizing to work for Australian male proportions, which means blokes who've struggled with fit from international brands often find Barramundies is the answer. Try the right cut in the right size and stop blaming your body for what's actually a product problem.