The resemblance of this series is given in the context of some of his characters. For example, in Mazinger, Boss is a fat teenager who is school rival of the protagonist of the series (Koji Kabuto) and who gets jealous when someone approaches Sayaka Yumi, while that in Albegas, Kumai Goro is also a rival school that Daisaku have and has the same feelings and attitudes towards Hotaru, than Boss had towards Yumi.
Also both female protagonists have a parent who constructs or improves the main fuse.
Both are un-popular old school mech anime, and both are more or less involved in the Voltron series. These shows may not have been popular in japan, but they were greatly popular in countries like Italy, France, and Korea.