The problem with the way you worded the question is that it's not just the power that seems to be affected, it's also the action, and recoil speed, so while yes, less rod is required for braid v mono (all else being equal) for a given presentation, and power may seem the most obvious, it's only part of the equation, indeed, given enough angler skill and experience, you could keep the same rod and fish it differently (in theory, LMB guys can't help themselves). It's a system, so you add or subtract stretch, and related shock absorption somewhere along the chain.