How do you distinguish aceto phenone and benzo phenone?

These compounds are distinguished by Iodoform test. Acetophenone reacts with iodine and sodium hydroxide to form yellow precipitate of iodoform. It is called Iodoform test
${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{COCH}}_3+3{\mathrm{I}}_2+4\mathrm{NaOH}\stackrel{ }{\to } {\mathrm{CHI}}_3+{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COONa}+3\mathrm{NaI}+3{\mathrm{H}}_2\mathrm{O}$
Benzo phenone does not give this test