What makes an "rf transistor" different from an ordinary transistor?
RF transistors are operated in their linear mode (for analog signals, going into saturation or full cut off will 'slow them down' dramatically), whereas the transistors you refer to are operating as a switch (either fully saturated or fully cut off, they will have an extremely low on-resistance and a high off-resistance). Entirely different modes of operation.

RF transistors can be extremely sensitive to static discharge.