FMCA health insurance vs AARP?

We have United Healthcare through AARP. We do not belong to AARP, but it is affiliated with them. We have had their coverage for 4-5 years and our Medicare supplement with drug benefits is $32/month for the coming year. Humana is $99, but has a little better inpatient coverage. We don't PLAN to have inpatient care, so we went with the cheaper of the two.

I know what is offered by state greatly determines the costs, so I guess it will depend on where your home area is located.