I wonder what the trade off is for the lancet esq X-Wing design vs a more conventional loitering munition layout like the ZT-10, seems like you're trading some range/payload size for minor gains in maneuverbility.
I think the main trade-off is weight vs endurance. Speed and cost may also be a factor.
The X wing designs generate more lift, but also more drag.
This means for launching X wing designs, you either need a catapult, rocket or a much bigger compressed gas charge compared to a conventional wing design. On top of that, the bigger and more wings themselves are also much heavier.
All of that translates into more weight (and cost). Not really a major issue for vehicle mounted or more strategic weapons, but if you want infantry to hump these UCAVs round on foot, that’s going to present problems.
Conventional wing layout drones are probably intended for general infantry issue and use, like a Digital Age RPGs, so they need to light and cheap enough to add to a soldier’s regular kit without needing to take too much off him to compensate and not break the bank in doing so.
For general infantry issue, speed would also be important since a lot of the time your troops will be deploying these while in a firefight, so seconds can cost lives.
The man portable X wing attack munitions are probably more intended for special forces use, like what we have seen with Russian special forces humping lancets deep behind enemy lines to hit high value targets.