Replacement battery options

[Campbeli]

Morning all,
Looks like the battery in our 2020 Giulia needs replacement. Stop/start has started playing up and it measures 12.25 volt. 5 years from a battery is probably reasonable
There are "fits your vehicle" options from Repco and Supercheap at around $550, but i believe the factory fitted battery is a Varta at around $650

Anyone else walked this path recently with some advice to share