From an article on Breakingdefense.com:
“There are probably 50 different configurations” being looked at for the final design, added Randy Rotte, who’s Boeing’s marketing director for FVL. All the different variations would probably look identical to the layperson, but in one iteration, the design team may try to squeeze out every possible knot of speed, in another they may prioritize fuel efficiency and long range, and in yet another they may aim for minimum cost, working through hundreds of highly technical tradeoffs trade-offs.=13.33px
In the next anticipated battle space (the Pacific) both high speed and long range with full payload will be required. That is the purpose of the FLRAA program (hint LR means long range). By stating the secret parts out loud SB is admitting their design can’t do both. This is very bad for their prospects when their highest possible speed or longest possible range are woefully short of the V-280’s demonstrated capabilities.