CCA is a rating that defines a battery's ability to start an engine in cold temperatures. The rating refers to the number of amps a 12-volt battery can deliver at 0°F for 30 seconds while maintaining a voltage of at least 7.2 volts per cell. This rating method is somewhat vintage and not all that applicable to modern engines with electronic ignition or fuel injection computers......as you likely won't get any spark or fuel when the voltage drops below 10 or 11 volts.
The original battery is in the vicinity of 220 Cold Cranking Amps.
The $38.85 battery from Walmart that Slow Lane listed has 150 Cold Cranking Amps.
https://www.walmart.com/ip/BATTERY-BTZ7S-FA/720108216The $19.89 battery from Walmart only has 80 Cold Cranking Amps.
https://www.walmart.com/ip/SigmasTek-ST5L-BS-Battery-Replacement/684786640The EXT12A EarthX Lithium Battery I have is rated at a "pulse" rate of 220 amps and a Cold Cranking Rating of 135 Amps. Lithium batteries cannot be directly compared to Lead Acid batteries as the discharge is different......Lithium batteries supply a very consistent voltage near the maximum under load - while Lead Acid batteries have a constant voltage drop as the battery discharges. I ride in weather that is always above 50 and my bike is stored in a heated garage - when I push my starter button the bike always starts within one or two revolutions and I never put much of a strain on the battery.
The 220 Cold Cranking Amp battery that Suzuki installed is a "World Battery", and it along with the multi-grade oils, compression release and choke allow the bike to be started in weather that is soooooo cold that I would never be riding a motorcycle in that weather! We had a member named Raydawg who lived in Washington State and he rode his Savage as his commuter to work and he had to start and ride his bike in really cold weather, and the 220 Cold Cranking Amps was likely necessary for him......especially as the battery ages and begins to lose some of power it had when new.
So with all that being said - if you ride in warm weather and you don't need to start your motorcycle on a cold winter morning, you likely don't need a battery that has 220 Cold Cranking Amps to get the bike fired up. Battery performance in warm weather is much better than it is when the battery is at 0 degrees, and your bike will start just fine if the battery can provide cranking power while still provide at least 10.5 volts to the ignition module.....which I believe is the voltage necessary for the Savage ignition to create a spark. As the battery ages and it can no longer provide the needed cranking battery and voltage - it will need to be replaced. The smaller batteries have less "reserve" capacity and all other things being equal - it may not provide adequate service at long as the higher powered original equipment battery.
Slowlane.....I believe you did a good thing buying the larger battery!