RANDOM comments

[Skyon Archer]

This upload speed difference could be a lot of things.

Your PC could be communicating with something on the internet, like updates to/from your PC.

It could be your neighbors. Although it is much less a problem than it used to be Internet Service Providers over sell networks. You share the bandwidth with many other people that live near you. The teenager down the street running torrents can cause a massive issue for others.

Usually it's not one simple thing that can be pointed out that can cause this speed difference you are seeing.