I've been in BC on the Carolinian and it was nothing to write home about. In contrast to Often1's report, I've heard that BC on the Carolinian can be nicer than BC on Acela. But I've not been on the Acela so I cannot confirm or deny that report. Acela is certainly newer and trendier, but I believe that the seats are a bit more padded and comfortable on the Carolinian.

There are two basic configurations of non-Acela Business Class in the East. One is the combined BC/Cafe where there are only about 2 dozen faux leather seats in a 2x1 arrangement. The other configuration is an Amfleet I or II with seat pitch that is similar to regular coach class on long distance routes like the Lake Shore Limited and the Silver Services. Where these are used, the coach class has much denser seating than BC. In other words, if you are in coach on the Silver Star and you transfer to BC on the Carolinian, you may not notice any difference. But if you board coach class on the Carolinian, you will definitely notice a difference. The 2x1 seating BC cars get swapped around the system and their whereabouts are often hit and miss. However, I believe that the Carolinian has two purpose-built trainsets and therefore always have the Amfleet I coaches.

What will you get for the extra $34 a piece? Not much, but it may be enough. I like to say that the most consistency there is on Amtrak is their inconsistent level of service when it comes to Business Class. You'll get slightly more legroom than coach, you may get a newspaper, you may get coffee or other beverages when the attendant walks through with a trolley cart. It may be less crowded, though last time I rode the Carolinian, it was sold out - including BC.

My suggestion - if you are travelling round trip, splurge one direction and don't the other and then post your experience here.

Enjoy your journey!