Looking for info, Aguascalientes Mexico. Retiring Thanks ahead

Me and my wife are wanting to get as much info as possible on retiring in Aguascalientes, Mexico.

We are also looking at San Miguel de Allende, Mexico.  Both have the weather we are looking for and in the mountains.  But San Miguel de Allende is more expensive then Aguascalientes.

So from what I can find Rent is 600 to the 1200 range is possible in both locations.  One has a Sams club and Walmart in town for special needs we can get in local stores. 

The biggest thing is we would like to know how much different each city is from each other. 

We are still learning Spanish so that might fit in.  I hear that 10% of San Miguel de Allende is ex-pats so we could very well find a lot of English-speaking friends.  But what is Aguascalientes like?

We found both locations have great cell service and good high-speed internet (I think anything 25Mbs down and 5Mbs up is good.  Internet for us is just to stream TV and basic searching)  Both have good medical and local food to buy.

Thanks for any info.