Doug,
I haven't built the Italeri or Hasagawa kit (do own the Hasagawa kit) so can only pass on some info. There are several builds in the Gallery section at www.aircraftresourcecenter.com and they range from exceptional detail but poor fit, needs some clean up and poor fit to it was a good build OOB.
My Hasagawa kit is several years old and lacks much of the updates done for Desert Storm up through today. Haven't seen their latest version so not sure if these have been addressed. The Italeri kit appears to be of a pretty current version.
Soo.... cheaper kit, good detail, and will need some work to put together to more expensive, not as up to date and fit who knows. I actually will be making the Monogram snap together kit in flying mode (just need to add cockpit, pilot and better weapons). I may buy the Italeri kit for an OIF version but probably won't buy the Hasagawa kit again, even if it is updated, cost just too much for me. IMHO.
Oh, Gary, you are correct that the Catalina's used by the USAAF in WWII were numbered OA-10 but I think Doug is talking of the current FAC version of the Warthog.