now I see where you are coming from. Vortex also sells a 15 guage monster spin string ( actually I think it's closer to 14);
however the 100 comes with a slightly larger 16 guage string while the 116 & 133 come with 15 guage amd a sparser stringing pattern.
You can buy the speacially made vortex string seprately in 15 guage . It's awesome!! Hybrid of poly & multi . Amazing string and cool black color!!