Kamen Rider Wizard (2012)

Both have monsters inside of them that either want to control or destroy the host. The main character helps to destroy that monster returning those people back to their usual selfs

Gaim is the series after Wizard so if you want to watch the Kamen Rider season in order watch Gaim after Wizard.

Wizard is the series after Fourze so if you want to want to watch the Kamen Rider seasons in order then watch Wizard after Fourze.

Both are Magic themed series
Both owned by Toei
Both fight mythical monsters and beings
A "red fire" wizard protagonist

Both are modern day fantasy stories with magic and superheroes.

The two shows each take a similar approach to its villains with demonic creatures taking over the bodies of normal humans after crossing a moral line/falling to despair. Only in Wizard this is not instantaneous and the victim is allowed to fight back or be saved by the hero.

The lead females of both shows also show similarities in their stories with the hero fighting to keep them alive and relationships with her father being examined.

Both protagonists have their forms based on Dragons. Along with both protagonists care about saving everyone. However, if you didn't like Saber's failure at saving people, Wizard focus on saving everyone that is in trouble. If you like the friendly relationship between Saber and his Secondary, Blades. Wizard has a similar relationship, although Beast doesn't appear for a while.