Princess SGX vs DF

As Princess have added a grooved low bow (DF) to their range this year that appears to be the same mould as the Y1 YLB (and it seems many others on the market and previously!), has anyone used or seen in person the Princess SGX and the grooved mould (most likely from another manufacturer as I doubt there will be many of the princess version around yet) to be able to compare them?

Any thought's on any differences other than the groove?

Cheers