Some suggestions from a customer:
Cannot find a way to ignore object owners when comparing
Toad created an Alter Table Add Column statement for a column that already existed in the target (same attributes). The column was in a different position in source vs target.
Toad attempted to add a NOT NULL column to an existing table. PostgreSQL does not allow adding a NOT NULL column via Alter:
ALTER TABLE IF EXISTS ONLY schema.tablename
ADD COLUMN IF NOT EXISTS new_col_01 bigint NOT NULL;