Why Borazine is more reactive than benzene towards Electrophic Aromatic substitution reactions ?

 In Borazine molecule, nitrogen is more electro negative than the boron. Nitrogen acquires partial negative charge and boron acquires partial positive charge and back bonding take place between boron and nitrogen. And it is more reactive as compared with Benzene, because Borazol is less stable and more reactive toward Electrophilic Aromatic Substitution reactions due to high polarity of B-N bonds borazine molecule while in benzene all bonds are non polar.

                                 Borazine