I can't say that I have noticed any of the oil I have tried getting any darker in colour between them
I do agree that if you are using a quality oil, of any brand with the right specs for your engine. They all do pretty much the same.
As long as you change it regular with the filter, you should be all good.
Yeah even at 292xxx km, it still drives very well. It has a slight oil leak somewhere underneath. But it doesn't blow any smoke whatsoever.