If you want to keep both cockerels you can, but it does take more work. You would definitely need lots of space, and more pullets. Many people recommend 10 hens to each rooster, but it will depend on the individual cockerels. Some boys are laid back and mellow, some are crazy hormone driven jerks.
You just want to watch them with the girls to make sure they aren't being over mated. Teenaged hormones... some people separate the cockerels from the flock until they're older and a little less 'mate every thing that moves' hormonal.
And then there's fighting. If the cockerels grow up together they do usually get along better. But they will almost always fight at some point, with one becoming the dominant rooster. That's where the 'lots of room' comes in. Make sure they have space to get away from each other if they need to. Those fights have the potential to get really ugly if they don't have enough space.
It's always a good idea to have a pen available for you to separate them if needed.
Also, if you've never had roosters before there are lots of articles and threads on here that can give you some really good advice on keeping them friendly.
RNewbie here. I've only had my "girls" about two months and they are four or five months old. Nine or ten days ago I got all excited because I thought Melie (short for Amelia) was singing for me, getting ready to lay. I've since realized that MEL was just learning how to crow. Melie/Mel is in the first pic, with pointed hackle and saddle feathers, sickle feathers, and a larger comb & wattles. Any idea what breed this is? I was ok with the idea of one rooster, but now Midge--not sure what the male version of that will be--is showing some of the same signs. Midge is the black chicken in the second pic. Her/his hackles are suddenly more pointed and he/she appears to have sickle feathers, although this one's tail has always been a little longer. The feathers are much more colorful than a couple weeks ago, too, showing more white and iridescence. I don't know what breed this is, either, so let me know what you think. Not sure what I'll do with two roosters, so I'm crossing my fingers that I'm just paranoid. Thanks for your help!
