It's funny north has had some amazing voice work in the past but I think you're right. Dinklbot may have been rather unenthusiastic most of the time but northbot just has this misplaced childhood excitement about things that seem more dark and serious (we've woken the hive) just to name one example of Dinklbot over North. I haven't been through every cutscene or new dialogue though so north may yet prove himself as the superior "little light" but Dinklbot isn't leaving popular opinion for a while