OP, do twins run in your family? If not, I would really encourage you to find some adult identical twins and talk to them, perhaps via a forum. It is really hard to forge your own identity as an identical twin. People are really shit at learning to tell them apart and with boys there are fewer tricks to make it easier when they are in school uniform (compared to hair accessories etc for girls).
Please consider giving them names which complement each other but do not match. Please give them their own initial. You and DH might have to compromise a little on your ideal names in consideration of what your boys’ experience will be like as they grow up.