Here is a rundown of the catalog prices in 1891.
Model 1876;
Standard sporting rifle, 28" round barrel.......$19.50 Octagon Barrel.......$21.00
Special sporting rifle, 28" round or octagon barrel........... $37.00
Saddle Ring Carbine.....................................................$19.00
Model 1886:
Standard sporting rifle, 26" octagon barrel.....$21.00
Special sporting rifle, 26" octagon barrel........$36.00
Saddle Ring Carbine....................................$19.00
As you can see, the prices were nearly the same for both models, at least in 1891.
Adios,
Buck