The differences that I'm aware of are:

The typhoon has:

1 Extra carbon filtration

Vertical DI filter

Fast Flush feature - A mechanism connected to the system to allow flushing of the membrane to prolong its life.

DI Bypass - A valve which allows you to bypass the DI stage. Useful when installing and flushing new filters. Useful for extending the life of the DI cartridge.

RO Only - Water that's Used for drinking, cooking, etc... (DI is said to be unhealthy to consume)

Color changing DI cartridge - shows when the di cartridge needs to be replaced

Free setup kit of your choice: washing machine, sink faucet, in line, etc...

TDS tester ($40 value)

Automatic shut off valve (very usefull if you ever impliment it into an ATO system)