Idk which would be more effective, but atm Stealth gives the MUTO the advantage. They are of similar size and such, and whilke both abilities, they aren't really used agressivly, more so passively. MUTO just seems slightly better equiped for this fight.
I’d give this fight to Rodan tbh. The only advantage I can see the MUTO having is stealth, but in the middle of a fight, where neither of them can be distracted, it would only be useful for maybe a single time before it just becomes a brawl. Since AP and Speed are about equal, I’d say Rodan’s Superior flying skills and heat manipulation give it to him. He’s demonstrably a more agile and experienced flyer than the MUTO, as well as having more battle experience since he’s not newly born and clearly has seen his share of fighting. His heat manipulation is actually pretty good, since he smothered and seriously wounded Mothra with it when he had her pinned down, which shouldn’t be too difficult to believe could happen if the fight goes on long enough. MUTO has some decent fighting skill, but most of it was just natural instinct, as well as against base Godzilla who is incredibly immobile, so I don’t think it would do good against Rodan who loves being mobile.
Rodan FRA by the fact we can assume its comparable to Mothra, whom's rated as the 'queen' of monsters A.K.A is pretty close to godzilla in power, whoms almost equal to Ghidora who could easily defeat a single muto.