I guess pricing in the USA is a bit different then in other countries. In Germany, Netherlands and Belgium the TKI2 kit is cheaper then the original TKI.
TKI € 839,-
SE € 599,-
MP9E € 599,-
TKI2 € 799,-
other pricing..
D8 € 479,-
Mbx6 € 559,-
Xray € 549,-