Raising two male rotties from the same litter??
I got two rottie puppies from the same litter, they are well behaved but everyone keeps saying that's not a good idea..
I raised rottweiler before, father and son no problem, what do you think?
In general, having two pups of the same sex can be problematic as they mature. From personal experience I'd say that two females are worse in this respect than two males, but it's not always the case.
Of course, all dogs are different and just because it can often cause problems, doesn't mean that it will ALWAYS be that way. It seems as though you were fortunate the first time around with your father/son Rotties, and you could also be lucky this time and they will continue to get along. However, it's also perfectly possible (even likely) that they will become combative as they mature.
But, as you are familiar with raising this breed you may be able to handle any squabbling and posturing that goes on and help them to overcome their differences so that they can live together long term. Again, a lot will depend on the individual dogs and their personalities. There are no guarantees one way or the other.
For first time owners, or those not familiar with the breed and perhaps not confident in their ability to deal with problems, I would definitely say do not try to raise two pups of the same sex together. However, for you the situation is a bit different and I think you'll have to follow your gut on this.
Until they reach adolescence they should be fine, and you can always re-evaluate the situation should problems arise. Of course, you would have to be prepared for the worst outcome, which is the they can't/won't get along and you find you can't keep them both. But that may or may not happen, only time will tell.
I'm sorry I can't give you a more definitive answer, but there are so many variables with each unique situation. I do wish you the best of luck though and hope it all works out well for you.