I was wondering if anyone has experience with both? I have used the Pyramid round wound pure nickel and I like them on my maple semi hollow. I just acquired an koa archtop and it is more on the thick side and not as bright. So I was wondering if the Thomastik-Infeld bebop'so were brighter. I use 10-46 pyramid, but I would get the 11-47 in the TI. I noticed the 4th & 5th strings are 26 & 34 (T.I) compared to 27 & 37 (pyramid ). So having those in a lighter Guage might benefit my hollowbody without sacrifice of loosing a thicker 1st and 2nd string, which I dig. Anyone have experience with the 2?