The first thing is subisu is DSL technology network. The second thing is Nepal Telecom ADSL provide only 256 kbps which is very low speed however it is available in almost all districts of Nepal. Although, the good thing about Nepal Telecom's ADSL is we don't need extra installation while set upping for the first time cause the service is provided by the same telephone line.
Talking about Subisu, it offers network speed ranging from 1 Mbps to 100 Gbps in 1 Mbps increments. The youtube playback in subisu is super fast as well as peer-to-peer torrent sharing is also good since they have hosted youtube cache server in Nepal. Subisu provides wireless internet and fiber internet as well. However, it's service is running in only 65 districts of Nepal.