Whether a two-stage thermostat is used similar to a one-stage thermostat depends on its design, but many manufacturers offer similar models. As a result, multistage thermostats are often the same as one-stage models, but have an additional switch or button to change between modes.
Since manufacturing thermostat parts is expensive and companies invest heavily when designing their interfaces, many manufacturers use the same base design for their single-stage and multi-stage thermostats. However, programmable thermostats may require more extensive tweaking to ensure users know which stage they're setting. Most multi-stage thermostats require users to manually change which stage is being used instead of switching automatically to keep systems from changing between stages too frequently.