Do a search and look at build-ups of the various kits. I'm not saying the IMC/Testors or the Aurora/Revell can't be built into a very nice model but they are far more challenging to build than any of the Fujimi/Revell versions.
Also only the Fujimi/Revell and LS/Arii are 1/24 scale, all the other kits are 1/25 scale. If that matters.