I am aware that particles in string theory are different vibrating modes of strings. I am also aware that compactification leads to emergent fields from the parts of the metric of the compactified dimensions (I'm assuming this works the same way as in the Kaluza- Klein model). My question is whether particles arising from the quantization of these fields are treated differently from the string particles?
If yes then how are the usual problems of quantum field theory subverted for these fields?
If no then how the differences are reconciled?
An answer without delving too much into technicalities of string theory would be appreciated, if possible since I have no formal knowledge in string theory.