Can't tell for sure. If you can post better, clearer profile pics it may help.
IF they are 2 males, the squabbles are just as part of the hierarchy system Angels instinctively have. One is just showing the other who is boss. This should not really be an issue unless some real damage is done and that typically shouldn;t happen as long as it's just the 2 fish. Make sure you are giving the fish a big enough tank so that the subordinate one has a place to get away from the other one. That being said, should you add a third fish and it turns out to be a female and these both ARE males, these squabbles WILL turn into fights if one wants to breed with the female. Separation will then be your best bet.
Hope this helps