I have taken multiple trips with both companies and they are similar in just about every way, including the surprises. My DS (14) and I took the Ireland
ABD this past July. I went through the same process you are going through now. I compared the itinerary day by day, and a lot of the activities were the same. One of the main differences was the Rock of Cashel stop with ABD and the train to Kinsale with TB. I liked the idea of taking the train, but the activity in Kinsale was making jewelry, which I thought I might like. But DS isnt a fan of doing crafts, so I thought he might prefer the Rock of Cashel visit. But now that Ive taken the trip, I regret that decision. On the Rock of Cashel day, that was our only scheduled activity, and it was something I wouldnt have minded missing. The rest of the day was on our own. There was a lot of free time on this trip and a lot of additional expense for activities and food. Other than a few little gifts here and there, the only surprise was a short stop at Abbeyliex for tea and scones. The other main difference is that ABD spends more nights at Dromoland Castle, which is actually a manor house and not a castle. Its nice, but I wouldnt make a decision based on that. Overall, I was rather disappointed in the itinerary. There really wasnt any VIP access to anything, which is one of the main perks that ABD claims to offer. No special access to Blarney Castle, for instance we just got up really early to beat the crowd. The guides (who were great) bought our tickets to see the Book of Kells so we didnt have to stand in line, but we had to squeeze in with the rest of the crowd, which was not pleasant at all. I could have bought tickets online and skipped the line anyway. DS and I both agreed that our favorite activities on this trip were the ones that I planned on my own for our free time. There was a lot of time on the bus and not enough time at some of the attractions (Cliffs of Moher for instance). If I had to choose a tour, I would choose TB. I am not a particularly confident overseas traveler, but knowing what I know now, I would do this trip on my own instead of taking a tour.