Only thing I can really tell you dude is to wait and see how you like them. You already ordered them, so what difference does it make? =P
If it helps, I think my HJE900s sound far better than my full-sized JVC RX700s, which are very well regarded as entry level full-size cans, and I've seen those compared a number of times to the KSC75 and though of as being superior. This is an extremely arbitrary comparison, but Joker gave the KSC75 a 5.5/10 in sound, and gave the PX200-II a 7 in sound, and I think the RX700s sound equal or better than my PX200-IIs, and I think the HJE900 sounds substantially better than either of them. Some people think it's impossible to get comparable sound quality to a full-size from an IEM except at very high price discrepancies, but I strongly disagree.
I am quite confident the HJE900s are the "technically" superior headphones. Whether or not you prefer the sound signature, though, is a different question. You'll have to see when you get them, and possibly mess around with tips and mods. They may or may not be for you, but I hope you like them!