As of the 1924 season, the results of the differences in the USCF rating systems were as follows:
Average rating
Old system = 880.56
New system = 877.44 (-3.12)
Median rating
Old system = 900.00
New system = 896.00 (-4.00)
Logarithmic loss
Old system = 0.245481
New system = 0.245145 (-0.000336)
Mean average error
Old system = 0.368463
New system = 0.367690 (-0.000773)
Root mean squared error
Old system = 0.434205
New system = 0.433855 (-0.000350)
Analysis: The ratings were down, but predicting the results were better.
Average rating
Old system = 880.56
New system = 877.44 (-3.12)
Median rating
Old system = 900.00
New system = 896.00 (-4.00)
Logarithmic loss
Old system = 0.245481
New system = 0.245145 (-0.000336)
Mean average error
Old system = 0.368463
New system = 0.367690 (-0.000773)
Root mean squared error
Old system = 0.434205
New system = 0.433855 (-0.000350)
Analysis: The ratings were down, but predicting the results were better.