Typical Resistance Temperature Coefficient Variance between a reel of same value resistors
I took some quick measurements, I made a divider using resistors with 50ppm temp coef. and the divider temp coef. The worse error for a divider with equal resistors would be TC/2 which would be 25ppm, the value I measured was near 10ppm so approximately 2.5 times improvement in temp coef. for my case. I only took one measurement and I know that's not statistically right but that's enough answer for me.