Download and upload (downstream and upstream) speeds may be the same or very different. Sending and receiving files between computers over a local network transmit at roughly the same speed. However, transmission speeds to the Internet (upstream) and from the Internet (downstream) are not always the same. It depends on the provider and service agreement. For example, business customers may have the same down/up speeds, while residential customers generally have a much lower upstream speed to prevent them from operating an Internet business.
For Consumers - A Little Data Up - A Lot Down
A Web page is requested with a very little amount of text going to the Web server, but the text and images coming back can comprise a thousand times as much data. Video is a more extreme example. A small text request can retrieve a two-hour movie (several gigabytes of video).
For Business - A Lot of Data Up and Down
Business customers operating a website may be sending out tons of data, which is why commercial customers are charged more for the service and are given a lot of upstream bandwidth. See download
Residential Service Speed Test
These cable Internet results from the Ookla website exemplify the difference between upstream and downstream speeds to a consumer.