AGM work best with a slightly different charging profile than flooded lead acid, also AGM are more sensitive to higher charging voltages, if your charger / converter does periodic equalization charging, don't use it with AGM if it equalizes at over 14.4VDC.
As to the topic of AGM in general, they cost a fair amount more than standard flooded Lead acid, in fact with the raising cost of lead acid batteries of all types, and dropping prices on LiFePo4 lithium we have reached a point in time where LiFePo4 can actually be cheaper than AGM.
This Group 27 AGM rated at 95AH from NAPA with 12 month full replacement warranty is listed at $322 at the moment
https://www.napaonline.com/en/p/BAT9827M
For less money you can get a semi-name brand 100AH LiFePo4 with low temperature charging protection from Amazon starting around $300
https://www.amazon.com/gp/aw/d/B0C8T1FD7M/ This comes with a 5 year warranty and an estimated 4,000 to 15,000 charge cycle life (4,000 charge cycles is cycling the battery once per day for almost 11 years). Some no name 100AH LiFePo4 batteries are under $150 online now, but you get what you pay for, and some of these are poorly built to the point of being unsafe, and are often built with used or grade B cells.
Of course if you switch to LiFePo4 you might need to upgrade your charging system / converter to one that is LiFePo4 friendly (note some lead acid converts will work with LiFePo4, some will not even if they are not marked as LiFePo4 compatible), for example my Progressive Dymanics 9200 converter which does not have a "Lithium" mode works fine with my LiFepo4 batteries, though is not a perfect match, going on 2 years now with no issues.