I'm a free-ranger with no coop experience, but in my experience outside roosters will typically only fight a single time seriously after which a pecking order will be established. However it's possible that two roosters with game blood trapped together could turn lethal
The most practical...
They're probably fine hanging out together if they were companions in the wild. Most roosters aren't mindless berserkers and will tolerate other males they grew up with
Roosters and hens will both travel quite far in search of each other
Last year I sold my Brahma rooster and replaced him with an immature cockerel. The very next day I had a random Leghorn rooster in the middle of my flock trying to court my hens. The Leghorn had travelled maybe 500 feet...