SSSS.Dynazenon

big mecha, similar art style, epic music and is just really fun. 

Both focus on the development of the characters and their relationships, mainly teenagers with some kind of trauma or existential angst/dread. Both from studio Trigger, so expect flashy art style and animation.  

Did you like a a cool combination giant robot or 90s vibe super robot anime ? if you are, this anime is for you  

SSSS.Dynazenon and Shikizakura are both shows that try to evoke Tokusatsu genres (Kaiju and giant robots in Dynazenon; Sentai-style heroes in Shikizakura). Both shows are also ultimately stronger on the human element, with good quiet chemistry between their characters aside from the supernatural battling, despite having good action. Dynazenon is deeper and more emotional while Shikizakura is more light and fun, but their strengths are ultimately similar.