Something to be aware of here... it was the "Coke bottle test" that got
George into all the GAMIjectors to begin with. He didn't like the way
the engine ran. So, although of questionable legality, played with the
"Coke bottle test" until he got all the injectors to put out the same
amount of fuel. ... And the engine ran WORSE. He figured he'd spend
the rest of the day figuring out why... and a couple of years later, he
had! G

What you want is the fuel/air mixture to be the same for ALL cylinders.
Ideally this would equate to the same amount of fuel in each, but in
the real world it does not. When set up right, since all cylinders
have the same FA mix, they will all peak at the same time. Differences
in probe positions, and differences in cooling air flow, will generate
different measured EGT's (as well as condition of plugs, mags, etc.).

With standard injectors just rotating them should be okay (and legal)
-- all you are doing is using the really terrible QC from the
manufacturer to your benefit. Traditionally the Coke bottle test
involves also ordering sets of different orfice dimensions form the
mfr. and adding them into the mix. This messes up the measured fuel
flow readings and required recalibration of the fuel metering system.
[Hence the reason the FAA frowns on it.]

Frankly, 110 max difference in EGT isn't meaningful. As someone else
suggested, look at the spread in FF vs. peak temp for each cylinder.
THAT will tell you if you have a problem or not.