Samsung SSD 830 256GB?

Hi everyone,
I was just wondering: the official list of supported Solid State Drives mentions the Samsung SSD 830 512GB (MZ-7PC512N/AM) as being fast enough for capturing RAW (see http://www.blackmagicdesign.com/support/detail/faqs?sid=27541&pid=27542&os=mac). I was wondering why the 512GB was listed and not the 256GB? Is it slower?
The AnandTech review of the 830 series states the same read/write speeds for the 256 as for the 512GB version, however slower speeds for the 128 and 64GB versions. I bought the 256GB version a week ago, was this a mistake?
Maybe somebody here knows or someone from BMD could clarify this?
-Chris.
I was just wondering: the official list of supported Solid State Drives mentions the Samsung SSD 830 512GB (MZ-7PC512N/AM) as being fast enough for capturing RAW (see http://www.blackmagicdesign.com/support/detail/faqs?sid=27541&pid=27542&os=mac). I was wondering why the 512GB was listed and not the 256GB? Is it slower?
The AnandTech review of the 830 series states the same read/write speeds for the 256 as for the 512GB version, however slower speeds for the 128 and 64GB versions. I bought the 256GB version a week ago, was this a mistake?

-Chris.