More details from High End Systems (www.highend.com):
The user will be able to, with the use of a software code purchased from High End Systems or one of our dealers, move from any version to a higher model.
In addition to broadening the range, this has also enabled High End Systems to offer the consoles at even more competitive price points, furthering our aim of making Hog available to all possible markets.
In addition to this, all versions will include a Light Converse visualizer, further increasing the power of HedgeHog 4!