Use the Accumulate argument to pass the homestyle variable, to easily compare the actual and predicted response for each observation.
CREATE TABLE rf_housing_predict DISTRIBUTE BY hash (sn) AS
SELECT * FROM Forest_Predict (
ON housing_test
Forest ('rft_model')
NumericInputs ('price ', 'lotsize ', 'bedrooms ', 'bathrms ',
'stories ', 'garagepl')
CategoricalInputs ('driveway ', 'recroom ', 'fullbase ', 'gashw ',
'airco ', 'prefarea')
IdColumn ('sn')
Accumulate ('homestyle')
Detailed ('false')
);