Taking cara babies

Does anyone know how different the ABC’s of sleep course is from the Ferber method? I feel like the two are similar and I’m not about to spend $130+ if that’s the case🤔

I currently have an almost 5 month old who sleeps through most of the night and falls asleep independently. But he usually wakes once in the night and we struggle getting him back to sleep. It takes 1-2 hours. I don’t think I need a whole sleep course but I would like his sleep to stop getting interrupted like this..