"N2EY" wrote

Not necessarily a good comparison. Conditions during one weekend may
be better, for example.

While one mode or the other may have an advantage due to better
conditions (or whatever) in any single given year, the Nov SS contest
has been run with CW and Phone weekends 14 days apart for many decades
(1st and 3rd weekends of November respectively). Without a SINGLE
exception, the average scores on phone weekends are significantly higher
than on the CW weekends, no exceptions. The reason is that the exchange
is faster on phone than on CW.

73, de Hans, K0HB