I have the exact same V1 headers from Super Sprint but the Euro Version (missing the extra O2 sensor bung). They bolt up to the OEM section 1 if you want to retain the secondary cats. Either way, you'll need a tune to take full advantage.
In short, it appears that SSV1 headers offer slightly more power than Euro. At full MSRP, it's likely not worth the extra money; however, for a deal like this, it might be worth your while.
The M3Forums have some good info offered here:
http://www.m3forum.net/m3forum/showp...51&postcount=4