I don't notice when I repeat. Like sometimes I send someone a voice text and I don't feel like I've stuttered at all but when I listen to it I notice my repetitions. with blocking though IT IS REALLY DIFFICULT. I domt know which one I do more but blocking is definelty the worst. (and also as I said I don't notice my repetitons myself, and it dosent cause me phsycal pain and anxiety like I feel when a block is coming. short answer: Blocking. It sucks