I wouldn't doubt it. Shimano has found out that they can add a little here and there, raise the price and sell a ton of them. I have 4 "old" Curado's and one new one and while the new one is a very good reel, I'm not convinced that it can do anything my old one's can't. I bought the new one because of the ratio, not to replace an old one.
The bottom line is that bearings make a spinning reel smoother and only 4 can help a baitcaster and nothing more, yet the manufacturers are putting emphasis on the number of ball bearings. The famous old Abu 5000 that started the trend toward high end free spool reels had no ball bearings. It's like diesel pickups, the ones 5 years old will pull virtually anything you're likely to pull, they keep adding HP and torque.