I would like to know were you heard about it.
The Carrara SDK is free. The Poser SDK isn't free last year  I was told by Bob Stockwell that  it was around 15K but I am not sure about the actual price.
Switch from Poser to DAZ Studio I am not suggesting that at all.
 Carrara can load and handle poser type content in what is know as Poser Native format and that is the  format that will be expanded or improved in Carrara 6. It means it won't be handle like in Bryce .:-)

Ringo

Quote - Ringo,

Are you suggesting us to switch from Poser to DAZ Studio?

I also heard it was daz that wouldn't let e-f have the carrara sdk.

Are you sure what you mentioned ?

Quote -
“There won't be any Poser 7 support as it requires a new poser SDK and that is something that hasn't been resolve between the companies.
What DAZ has said is that C6 will have better content support as one of its features.
Ringo”

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“I heard it was daz that wouldn't let e-f have the carrara sdk.
Miss Nancy“