In my opinion all of these ROMs are very similiar because they are all molded on the same base. I have seen some folks testing some different .dll and req settings, but for the most part all of these ROM's should perform close to the same.
I have built several ROM's using the No2Chem Version 107 Base. I have tested very aggressive builds and very conservative builds. Again for the most part I'm achieving the same experience. One of the big draw backs I'm running into with all of the variations of the WM6.1 ROM's is that I get random lock ups that require a soft reset. I've not been able to pin point the source. The important thing to remember is that this is sill very much a beta. Everyone has put a lot of great work into this ROM. I am so impressed with the members of this forum. Ya'll never stop amazing me, really. I'm convinced with all of the time that we are spending learning and sharing that this and many future ROM's will continue to grow.
So, long story short. You can pick whichever ROM you want from the great Vogue Chefs in this forum and be confident that you are gettting a quality product that will never be quite perfect because that is the foundation of windows mobile....there is always room to grow and that's why we are here.