The only difference is the color between the JT Eaton Insecticide Red Duster and the JT Eaton Insecticide Green Duster.
No, the JT Eaton Insecticide Red Duster is only for dry dust applications, not for any liquids. Keep in mind that termites in your compost may help break down any woody material there more quickly for you.
Yes, the JT Eaton Insecticide Red Duster can be used to apply baking soda. You would just want to be sure that your place a small pebble or coin inside with the baking soda so that it can break up any clumps that may occur.
The JT Eaton Insecticide Red Duster measures 9.50 L x 3.00 W x 5.75 H. The nozzle is about 6.5 inches long.