The Renault UE was not a reconnaissance vehicle or scout carrier. It was a resupply or AT gun tractor. The French had other vehicles for the reconnaissance role.

Does anyone know if these are actually "new" models, or are they just reboxes of previously released stuff with the extras thrown in?

re-boxes I strongly suspect

I think the armoured car might be new, the UE's could be older since there have UE's from Mirage before (35305 & 35307, 35216 was the trailer) There used to be a wz 34 from Encore, brrrrr.... Certi, Toga and maybe some other brand names ... I hope it is a new moulding / Robin It is probably the old kit ... LINK Mirage released it in 2012 but it first turned up in the late 19-eighties (previous century), getting close to 30 years old ...