Coles sells their own-brand bulbs in packs of 2 for $10 (per pack) but the similar Mirabella model is $10 for one.
These are non-dimmable and not smart downlights (cue jokes about being neither dim nor smart).
Apart from any performance difference, is there any safety concern with the Coles brand?
I know there were reports some years ago about similar lights from China and cannot find any assurance through Googling. I would hope Australia and Coles has improved their QA after such reports.
If anyone had any safety issues it would be all over the news. Can't say I've ever had any issues with Coles brand bulbs and I've had several over the years.