So what good is the Euro 5 compared to the Cali 5?
I really don't know the product history between the two offices.
After doing a little looking around (because I didn't know either), it seems like Fcator 5 GmbH is the parent company who has basically turned all operations over to Factor 5 San Rafael sometime after they opened the US branch.
Now Factor 5 SR ran into financial troubles with Brash and Factor 5 GmbH became active again as a back up plan to get out of all unwanted liabilities and move shop.
That's it. Factor 5 GmbH was likely a one-man show with Achim Moller - right until last December when Factor 5 Inc. ran into financial difficulties. Now the remaining Factor 5 Inc. staff seems to work for Factor 5 GmbH.
In addition, Factor 5 and the Factor 5 logo as well as Denaris, Katakis, MusyX, Thornado and Turrican are no longer trademarks of Factor 5, LLC (or Factor 5 Inc, as they are called more recently). They belong to Factor 5 GmbH now.
(http://www.factor5.com/legal.shtml --> was changed today!)
So after Factor 5 USA/Inc. had closed down, all operations were taken up by Factor 5 GmbH.
So it would seem that while the San Rafael office is going to close, the employees might not be relocating very far. They could still be working on the unannounced Wii game from a new smaller location now under the the New (old/original?) Factor 5(GmbH).
edit:
Apparently some "ex" Factor 5 employees have already formed a new development house to work under the Factor 5 GmbH held IP's & trademarks
new company name: WhiteHarvest LLC