From a purely mechanical perspective they are full casters with medium armor keying off wisdom with a varied spell list. Few other full casters get medium at 1, no other full caster can get heavy with a sub class. You use wisdom which is a much better save than int or charisma, it's the perception stat which is the most important skill.
You get spells arcane casters don't like spritual guardians and contagion. You also get a d8 which is bettee than sorc and wiz. On top of this you can get a little extra melee or stealth or skill monkey utility or whatever. But that extra stuff is just to help you excel a bit more at a particular niche, it's not to give you equal normal attacks as a fighter.
The best classes to compare them to are bards, wizards, druids, sorcerers.
Not eldritch knights and paladins. While there is cross over between a martial type cleric and those classes. They are on different ends or the martial caster spectrum.
You get spells arcane casters don't like spritual guardians and contagion. You also get a d8 which is bettee than sorc and wiz. On top of this you can get a little extra melee or stealth or skill monkey utility or whatever. But that extra stuff is just to help you excel a bit more at a particular niche, it's not to give you equal normal attacks as a fighter.
The best classes to compare them to are bards, wizards, druids, sorcerers.
Not eldritch knights and paladins. While there is cross over between a martial type cleric and those classes. They are on different ends or the martial caster spectrum.