[time-nuts] HP10811 taxonomy?

[Charles P. Steinmetz]

Has anyone compiled a taxonomy of the apparently numerous variants of 
10811 OXOs?  (Distinguishing features, rated performance, used in 
what instruments, etc.)

Also, I found Mark's observation that 10544s may drift less than 
10811s interesting.  I own several 10544As and have experience with 
perhaps several dozen others, and think very highly of them, but 
haven't seen enough 10811s for a meaningful comparison ("meaningful" 
being a relative term, when the sample sizes are as low as 
dozens).  What have others observed?

Best regards,

Charles