I've had boys and girls get spayed/neutered. I had two brothers neutered at the same time and kept them together. They were totally fine. Didn't bother their own stitches and didn't bother each other's stitches. I also had 2 girls and 1 boy fixed at the same time and let them live together immediately (woke up together in the same recovery cage) and that was part of their introductions and it worked amazingly. they were able to live together and bonded right away from waking up together and groggily snuggled as they sedatives wore off. They didn't bother their own or each other's stitches either.
Whatever you do, it's a good idea to keep a very close eye on them at least for the first 24 hours to make sure they don't nibble themselves or each other. they may also need pain meds and if they are acting too unhappy or doing the owwie stretches too often.
I also had a girl have an emergency spay because of uterine bleeding earlier this year and I think I kept her separate overnight in a travel cage next to my bed, and she was ok. Put back in with her family the next day and no problems.
The only time I had problems was with my recently passed on heart-rat who had 2 surgeries to get a spay and tumors removed. It might have just been her own quirky nature or the tumor location surgery, but she was awful with tearing at her stitches. after one surgery she left it alone and it was getting well healed, but after a week, she decided to rip it open and bleed everywhere, very scary. but thankfully she didn't bother the spay incision hardly at all, just the tumor incisions.
I hope that was helpful! I've yet to have any issues with spay/neuter stitches and I think your boys would be safe together as long as you're able to watch them closely the first day.