Personally I find the Watchtower only differs cosmetically (outward appearance) from those they criticise:
*** w85 12/1 p. 6 Righteousness Before God—How? ***
As a Catholic, Luther had learned that man’s justification involves baptism, personal merit, and good works, as well as the sacrament of penance administered by a priest, who hears confession, grants absolution, and imposes compensatory works that can involve self-punishment.
In his efforts to find peace with God, Luther had expended all the resources of Roman dogma on justification, including fasting, prayers, and self-punishment, but to no avail. Unappeased, he read and reread the Psalms and Paul’s letters, finally finding peace of mind by concluding that God justifies men, not because of their merits, good works, or penance, but solely because of their faith.