Typically Marine batteries have ~20% lower CCA than starting batteries, indicating slightly thicker and thus more durable plates.
They usually also have less warranty, but defects aside, the battery properly recharged is not going to fail within warranty period anyway.
I believe its wise to stuff the largest marine battery that one can, in their vehicle, even if a dedicated starting battery is lighter and has higher CCA and appears to be a better bang for the buck.
I know marine batteries come in size group 24, but they also come in group 27 which is about 12 inches long and group 29/31 which are 13 inches long 6.75 wide and 9.25 tall to the tops of the automotive posts.
Marine batteries usually come with regular clamps AND threaded studs for wingnuts or regular nuts. Marine/dual purpose batteries will often say 'deep cycle' on them, but their plate thickness is not really comparable to that of a true deep cycle battery.
A true deep cycle 12v flooded battery other than 8d or 4d sizes which are huge and 120 and 150Lbs each respectively, would have pathetically low CCA, and the few true deep cycle 12v batteries that do exist, do not even list CCA figures, only amp hour capacity figures at 20, 10 5 and 1 hour rates. They are a GC12 size group and the trojan t1275 is likely the best example, although interstate dealers can order them. They used to be made for interstate by USbattery, but that has likely changed and I am told by those who called and asked that one GC12 is nearly as expensive as a pair of GC-2's which are 6 volt golf cart batteries and the most durable deep cycle flooded battery option. A pair of GC-2's wired in series for 12v is likely about 650 CCA, and together weigh no less than 128Lbs. This gives a good idea what starting batteries sacrifice in order to eek out as many CCA as they do for a fraction of the weight of a true deep cycle battery.
Here's a '12v marine battery guts compared to a GC-2's guts:
If this topic is of interest to you, please read the following link, where I stole that pic from:
https://marinehowto.com/what-is-a-deep-cycle-battery/
The trojan t-1275 is almost 11.5inches tall and a slightly bigger footprint than a group 31, about 85 Lbs, and would likely have about 500CCA. where a group 31 starting battery likely has 1000CCA and weight about 55 to 60 and a marine 31 has 650 to 700CCA and weighs ~64Lbs.
https://www.trojanbattery.com/product/t-1275/
Marine batteries are likely best cycled no deeper than 80% state of charge whereas true deep cycle say 50%. Starter batteries should ideally never be discharged to 80% much less any percentage below that. 12v Marine batteries in deep cycle service almost always require higher voltages held significantly longer than expected, to revert the specific gravity to its maximum. If they are regularly deep cycled without this extended recharge regimen, they degrade quickly, but if never deep cycled or cycled deeper than 80% can give very good service as a starting battery.
As always the deeper the lead acid battery is discharged, and the more often it is discharged, the more important the recharge regimen becomes.
I'm going to be modifying a battery tray in an older Toyota Tundra to stuff a Marine 27 or 31 into the stock location soon. The owner plans to drive it to Costa Rica once the pandemic passes, and the itty bitty ancient battery currently in there is loose, with the most disgusting terminations I have seen, but without corrosion, and it still starts 'just fine'.
5 years ago I began modifications to fit a t-1275 inside my engine compartment, but stopped when a single group 27AGM located under the body proved more than capable of taking care of my needs, and I could stuff two under there. Now there is no battery in my engine compartment, or battery tray for that matter.
I think my owner's manual specs a group 34 battery with no less than 550CCA, and I have used 24, 27's and a 31 in the stock location, but the 31 was a shoehorn fit. and the handle design was the only reason it could be fit, as one handle could be pivoted out of the way and allow the hood to close all the way, but it was resting on the edge of the battery.
Good luck and do look for a marine group 24. Wally world likely has them, and they are likely less than half the price, and half the quality of Trojan's group 24, which is likely the best group 24 wet/flooded marine battery available.
but if you dont have the desire or ability to insure regular true full charges via plug in charging sources or solar, don't bother getting highest possible quality batteries, as they are not immune to living their life chronically undercharged, and will only slightly outlast the cheaper option when chronically undercharged. but if properly recharged to full regularly, they will likely outlive it by double, at the minimum.
As always, the best lead acid battery chronically undercharged, will not outlive the worst lead acid battery kept fully charged or at least returned to very high states of charge often and promptly after any significant discharge.