Not sure why they call it Frozen Silver when it is in fact based off of SSII. Frozen Silverstone would be a better name.
The Frozen Polar Silver (available only on E90 M3 CRT) is based off of Titanium Silver. I saw both next to each other at the 24Hr Nurburgring Race during the BMW M Festival last June.
2011 E90 M3 Frozen Black