Gear Fighter Dendoh

Schoolkids piloting giant robots in an current day setting. Both feature a comedic yet also serious setting with a mechanical enemy force, both have a bit more depth than it seem as first and also feature themes such as "growing up". Ultimately Go-Saurer is more comedic and episodic, Dendoh has a more elaborate and "adult" (for the lack of a better word) story arch. Both are highly recommended. 

Both are aimed at the same demographic group but they come from different ages. Both are child friendly(very very little fan service) but also discuss interesting themes like cloning, and trust me even kids like to be taken seriously. Daltanious hasn't aged well and has more repetitive action scenes but it makes up for it with a very good cast of characters that made me feel nostalgic. Dendoh looks more modern, has better action sequences and successfully builds up to the conclusion, although I would argue that Dendoh has a more childfriendly story where the characters are younger and are also plot armoured so in retrospect the drama feels a bit overdramatic but it's still a great story to introduce kids to the mecha genre. The premise of both anime series is similar with aliens attacking the earth and the protagonist accidentaly ending up piloting a super robot to destroy the aliens. read more 

Dendoh was originally supposed to be a series in the Yuusha franchise, but was spun off into its own thing, and the end results are high quality. You've got the same zany humour, strange enemies and impressive action. 

Both are typical save-the-earth, monster-of-the-week, super-robot shows. 

Kid hero, or heroes, piloting a Super Robot with multiple "combinations" kick ass and take names in awesome ways during 3 cours.