Mixing AGM and Sealed Acid Batteries

I wouldn't mix them but that's based on the little knowledge I picked up when I installed AGM batteries in my previous RV. The inverter/converter in it had different settings for the various types of batteries and I had to change its settings to match the Lifeline AGMs. I also bought an intelligent battery charger at the time and it has different settings for different types of batteries. That might be just marketing hype, but then again ... What little I could find in the manual seemed to indicate the optimal voltage levels used for charging were different for AGMs vs regular batteries.