Actually what do they mean? and what are the differences?
As beginner u won't understand most diffirences, but many many smart people are at it so don't worry.
In very short, SW is improvement for bitcoin in many ways and BU is just increasing 10 minutes blocks size to a size that is unsustainable in next years.
If SW is so much good improvement for bitcoin and BU is just increasing 10 minutes block size which will be unsustainable in next years then why I have seen BU has so many supporters ?
I am out of this discussion as Electrum wallet developer will have a wallet to support both chains if this fork ever happens but just want to know for simple curiosity. I am not tech savvy.
I think we are on the same level as far as the current raging debate of the Bitcoin community. I am not a technically-inclined person too though I am really trying to understand many of the concepts and the technology behind Bitcoin in particular and cryptocurrency in general. Right now, no side is winning on this continuing discussion whether to go SegWit or to go BU but I hope that whatever it might be the solution can be working for the interest of the greater good and not just a sector of the increasing Bitcoin stakeholders.