10 random blue ones:
9 had a coil count of 12,5. One was 12,25.
10 random brown ones:
7 had a coil count of 13,0. One I did count as 13,25, two as 12,75.
both are used boards, the browns were vintage browns, whereas the blues were modern blues.
I wouldn't deny that the one longer brown one came from transplanting them onto the current PCB, whereas the blues are still on their OEM board...
So I'ld say on my boards there actually seems to be a difference in coil count between brown and blue, whether or not that may translate into the fingertips....

btw, you now owe me one brown spring...
