It's possible the answer to this is living in an FAQ or an errata somewhere, in which case folks should feel free to point me in that direction with the same elaborate patience they'd reserve for their crazy old uncle. However, I've located something that's been bothering me.
The Narrator's Guide lists the Defiant-class as having a Class 8 warp drive with standard/sustained/maximum speeds of Warp 6/9.2/9.98. Happily, the information in the ship profile on page 147 is consistent with the listing in Table 9.9: Warp Propulsion System Costs, on page 141.
But then there's the Starships book.
Starships lists the Defiant-class as having an LF-35 warp system. The ship profile on page 52 rates the speed of the vessel at Warp 6/9.2/9.982. Yet Table 1.11: Warp Propulsion System Costs, on page 13, rates the LF-35 warp drive at Warp 6/9.2/9.8.
Am I quibbling to be worried about how Defiant-class vessels can travel at a maximum of Warp 9.982, when according to Starships their drives max out at Warp 9.8? Or is there some useful explanation for the inconsistency between the Narrator's Guide and Starships, and the Starships Warp Propulsion System Costs table and the ship profile, that I've missed?