Upload Speed ​​Connection

Your internet speed depends on your provider. However there are other factors. Are you using fibre optic, cable, ...and it depends on the area you live in, do other people in your household use the net.... many factors come into play here.

What are you trying to test? 

Basically you are asking why your Ferrari is faster on the race circuit than in city traffic.

That's odd. Download speeds are generally far more fast than upload. You might reach out to your internet provider

Upload speeds are generally lower with most internet providers. Check your internet uplaod and down load speeds using a free online test in internet and compare it to the times you are getting when using sftp.