ATV's come with gel batteries because they can take a bit more physical abuse.
But, there disadvantages can make them less appropriate for a highway driven vehicle. They are less tolerant to overcharging and have a lower charge voltage requirement. Per compared size they have a lower total charge and lower discharge rate capacity.
In an ATV, the gel cell is great. It'll work upside down and sideways. It has excellent spill protection (as does AGM). It is more tolerant of deep cycling and extremely low gassing means much less terminal corrosion.
So, durability can mean different things to different people depending on the application and expectations of use.
2013 V Star 1300 Deluxe
OEM Tall Sissy Bar
Memphis Shades Fork Deflectors
Bridgestone Exedra Max Belted Tires
Baron's RSTD 7308 bar