Is there a way to compare two individuals by the 7 digit ID numbers to see how they are related?
Like "viewing your relationship" but instead viewing your relationship it would of two individual trees not related to you.
Welcome to the "Community.FamilySearch" Forum.
I am just another 'lowly' User/Patron ...
Just in passing ...
Providing, that you are referring, to "Comparing", two (x2) individuals/persons, in the "Family Tree" Part, of 'FamilySearch', against each other (which, I think you want/mean); and, NOT, against the various "Records", held in the "Search" (Records) Part, of 'FamilySearch'; THEN ...
Short Answer: 'Yes'; but, NOT directly in/through 'FamilySearch' ...
Just in case you were not aware ...
IF, you have not already utilised such; THEN, I humbly suggest that you try ...
(BYU) RelativeFinder, which is one of a number of the, Third Party Applications, that are Certified to work with Family Tree of 'FamilySearch'.
BYU = Brigham Young University, in Provo, Utah, USA (ie. the Church University).
Specifically, from the Family History Technology Laboratory, of the Computer Science Department.
Provide, one's "Ancestral" Lines, in Family Tree of 'FamilySearch', are somewhat extensive ...
Then, using (BYU) RelativeFinder, one should be able to 'see' one's "Relationship" NOT only with, "Famous People"; and, many, "Others"; but, ALSO between, (1) one's self and a "Deceased" individual/person (if, there is one of course); and/or (2) two (x2) "Deceased" individuals/person (if, there is one of course); and/or, (3) one's self and a another "Living" User/Patron (if, there is one of course); PLUS, one can ALSO "Print" the connections/links between them.
And, it is simple, just a matter of "Signing In", with the "Credentials" of one's 'FamilySearch' Account; accepting the "Conditions"; and, the "Connection" between, "FamilySearch' and (BYU) RelativeFinder; which, then becomes a "Partner" Account, that is "Connect" to 'FamilySearch'.
(BYU) RelativeFinder digs (pun intended) a lot DEEPER in Family Tree of 'FamilySearch', than 'FamilySearch' does.
Here is direct link to (BYU) RelativeFinder:
(BYU) RelativeFinder has MANY 'Bells and Whistles', that you might find useful.
Apart from "Famous People" and "Others" ...
(BYU) RelativeFinder has some interesting options ...
There is an option to see if there is a 'Connection' between yourself and a "Deceased" individual/person in Family Tree of 'FamilySearch'.
There is an option to see if there is a 'Connection' between two (x2) "Deceased" individuals/person in Family Tree of 'FamilySearch'.
There is an option to see if there is a 'Connection' between ("Living" - Users/Patrons) Friends in Family Tree of 'FamilySearch'.
Explore relatives of a deceased person as if you were them by inputting their FamilySearch.org PID.
Just my thoughts.
I hope. that this may help/assist.
ps: Caveat - Please be aware, that NOT "All" Users/Patrons, may have success; but, hopefully, many will.
Thank you for your response. I will give it a try!