Right now I'm playing a full set of permanents which I'm really quite happy with all around, but for a new piece I'm playing I kind of would like to try something just slightly warmer on top. I was thinking Original Chrome steel because I think that little bit of extra warmth would fill out the tone when I'm playing way up in thumb position at the end of the finger board. But now I'm wondering how a brighter synthetic core string would sound like an obligoto or a Zyex? Outside of brighter vs darker, and louder vs quieter is there any major difference between a set of steel strings and synthetic strings?