No. 1 is DEU with medals, belts, and gloves. No. 1A is DEU with medals.
I believe the orders of dress you are referring to are No. 1B(full dress), 1C(patrol dress), and 1D(patrol with ribbons).
Dress instructions | Annex A Ceremonial dress - No. 1 - Canada.ca
Yes I'm aware, generally when someone references No 1's, they aren't referring to the oddly place DEU orders of dress.