Sometimes you get what you pay for. Sometimes not.

And many more costly batteries have features you may not need; I don't need a bluetooth connection for example.

A big factor for me is warranty. Basically it's the manufacturer guess as to how long it will for sure last. And in my experience, sadly sometimes they're right. Not always though. So a battery that's say 60% more expensive but with a 6 year warranty might be a better investment than a cheaper one with a 3 year warranty, if the 3 year fails early.

And the warranty doesn't mean much if it's a giant PITA to ship it somewhere overseas, etc. So a local to your country source like say Australia for Redarc might be a big plus.

Also, some of the Redarcs etc probably don't cost the builders and shops the same as they do individual consumers. Or maybe the customer of those shops doesn't have a choice. The shops probably choose high end for various reasons that might not apply to you.

So at one end you can have Dakota Lithium with an 11 year warranty. Or some of the marine lithiums that are similarly high priced with long warranties. Great investments, but someone who buys a Litime with a 5yar might do a lot better over those 10 years.

And check customer service reports. Eg Litime: https://www.airforums.com/threads/returned-2-pairs-of-litime-100ah-batteries-%E2%80%A6-what-now.1453304/

And things change. I had a Battle Born when they first came out. 10 year warranty, great battery (and not any alternatives then except even more scarce and pricey marine ones). Got it at their factory. But since then? oof. They were sold, and now all kinds of issues.

Good luck.