The BR-S800U uses a modular design that lets you avoid buying some features that you don't need. The AG-7750 is slightly more responsive to tape transport control commands. At slower speeds, the difference in responsiveness becomes almost unnoticeable.
Frame seeks .
On the other hand, the first problem is easy to avoid, and the second is more a stylistic comment than a substantive one. Under certain circumstances the BR-S800U will ignore a cassette eject command. In contrast, the BR-S800U has only a shuttle ring, and the range of speeds available through this control is fairly limited. More to the point, our lack of a BR-S800U will hamper regression testing if we modify the driver in the future. Again, we do not anticipate any major difficulties.