Meh, Don has it pretty spot on. It seems like you are confusing terms.
"Alpha India Group," or "AI," (go figure) specializes in providing AI traffic. Since there have been copyright issues from 3rd party AI models that have severely crippled AIG's ability to operate at all, as a distributor of AI models, they now compel users to download their own content. "AIM," or "AI Manager," appears to check potential AI models for compliance to MSFS standard, before incorporating into flight plans. I've not used it and can't confirm this observation.
"IVAO," or "International Virtual Aviation Organization," is more of a club, or meeting room, to organize virtual flights. As such, it may offer unique AI models and it is unlikely that any would be "superior," to any other, IVAO will almost certainly not duplicate what is already available from a dedicated database, individual developers may conduct themselves otherwise.
AIM AI models that have been cleared for deployment in MSFS, will also work with AIFP in MSFS. IVAO does not appear to offer MSFS specific AI.