Congrats on your purchase! Fonder is a drop shipper just like the BN, JA, etc. So you might see the same diamonds they sell is also listed on bluenile, etc. which are going for slightly less. For the same spec, you can get a 0.6ct on BN.
Just note that Fonder's have their own definition of a ''super ideal cut''. I don't think it follows industry standard. Cos some of the none Triple Excellent or ''Very good'' graded diamonds are also being sold as their ''Super Ideal Cut''. I also see some of their SICs are listed to have brownish colors, fluorescence, etc. Just be abit more careful with those.
I don't think yours is a Super Ideal Cut based on the proportions being out of the ideal range and fluorescence, but most important is that you like it then can already.