i think the basic difference between taz and cr is best illustrated by how they both handle zone of truth
in cr you have to tell the truth, but you can choose to not answer
in taz you are compelled to tell as many truths as you can get out, question-relevant or not
question: did you murder that stranger
critical role: i don’t know who that guy is (technically not a lie, since he’s a stranger)
the adventure zone: NOT ONLY DID I MURDER THAT MAN, I WENT INTO HIS CLOSET AND LICKED ALL HIS VESTS BECAUSE THEY WERE VERY STYLISH AND I NEEDED TO MAKE SURE NOBODY ELSE WOULD WANT THEM
In a campaign I’m in, the PCs have just returned to the present, having gone 500 years in the past (accidentally) and stopped a red dragon from destroying a city just by talking to it. When we were pulled in for questioning about a completely unrelated murder we weren’t involved in, the guards cast Zone of Truth… and we proceeded to dump out the whole story to this poor guard because HEY SOMEONE’S GOING TO BELIEVE US!