Re: too much running vs too much weights...whats worse???
Well, it's never this clear cut, but a heavily muscled guy will never fight someone of the same height who is skinny. Equal weight classes generally mean the heavily muscled guy is shorter.
Therefore, he's already at a disadvantage with reach, and dynamics of spacing/footwork might mean he works harder to get in/out, plus the increased muscle mass could mean more oxygen & blood being used for each movement, so endurance may suffer.
Hopefully muscles is skilled enough and fast to win. More seasoned fighters can make this work. However, I noticed that novice amateur matches tend to heavily favour guys with better endurance and skill & technique (while important) falls slightly behind endurance.