For the profile update triggers you need to compare raw database var1 and var3 values. Example as follows.
[var1_cb_redirect_email] Not Equal To [var3_cb_redirect_email]
Variable 1 for the profile update trigger is the new and up to date user object. Variable 3 is the old user object before the changes were made. You however probably should be using the onAfterUserUpdate trigger unless you're needing to alter the user object before it's saved. Note that trigger is for frontend only if you need it for backend as well then you also need to select onAfterUpdateUser in Triggers.
Kyle (Krileon) Community Builder Team Member Before posting on forums:
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