Alaw vs ulaw


What are the differences between ulaw & alaw? are they same quality and use the same bandwidth?

Thank You

A-law is used in Europe, mu-law is used in the USA.
The A-law algorithm provides a slightly larger dynamic range than the μ-law at the cost of worse proportional distortion for small signals. By convention, A-law is used for an international connection if at least one country uses it.
The bandwidth is the same - 64 kbps.
These vocoders are united under the one standart - g.711.