SmartThings vs Aurora AOne hub?

It depends on whether you are using the official features or whether you are using custom code like webcore.

If you are using Webcore, you can create extremely complex rules. (The topic title is a clickable link)

A few, but not all, of the Aurora devices have now been officially certified as “works with SmartThings“ in the UK. There is a discussion thread open for the individual devices, but no reviews yet.