nested ifs vs elsif

my_test:process (CLK, RESETn)

begin

  -- Clear signals to default values

  if RESETn = '0' then

            addr_inc <= '0';

            load <= '0';

            trans_dec <= '0';

            address_cnt <= 0;

            transfer_cnt <= 0;

            reset_cnt <= '1';   

  -- register ...

  elsif rising_edge(CLK) then

        -- memory address counter 

        if reset_cnt = '1' then

                address_cnt <=0;           -- reset counter

        else

                if load = '1' then

                        address_cnt <= to_integer(unsigned( head(14 downto 7) ));   -- load value from header

                else

                        if addr_inc = '1' then

                        address_cnt <= address_cnt + 1;                             -- increment by one

                        end if;

                end if;

        end if;

        -- memory transfer size counter 

        if reset_cnt = '1' then

                transfer_cnt <= 0;                                          -- reset counter

        elsif load = '1' then

                transfer_cnt <= to_integer(unsigned( head(6 downto 3) ));   -- load value from header

        elsif trans_dec = '1' then

                transfer_cnt <= transfer_cnt - 1;                           -- decrement by one

        end if;

  end if;

end process my_test;