...tbey discover the two species are not so different, after all!
Written and illustrated by series creator Russ Manning, the tale from Gold Key's Magnus, Robot Fighter #8 (1964) intrroduces more background about the alien homeworld, including weapons technology like the previously-unseen helmet-guns!
(In the first chapter, the aliens used hand weapons, like the Earthmen.
Perhaps, at home, among civilians, their police/soldiers don't want to display obvious weaponry...)