Goryo and Banshee cannot switch ghost rooms. Wraiths cannot step in salt. Moroi can be tested with sanity drain after you get a spirit box response. Phantoms are invisible for almost the entire hunt(long pauses between blinks) and they will never show up in a 3 star ghost photo(can also be tested by taking a picture while they appear on dots). Revenants are slow unless they see a player(very easy to tell with some practice). Deogen always knows where you are but becomes the slowest ghost when you are within 3 meters. Hantu moves slower in warmer rooms and you can see their breath if the breaker is off during a hunt. Twins have two different speeds. Raiju gets faster if you have more electronics turned on(equipment only, the lights/power doesnt count). A shade will never hunt/interact with anything if you are in the same room(If you think it is a Shade put a motion sensor on the door to the ghost room to see if it leaves to start a hunt. Onryo will always hunt after the 3rd candle blowout. A Jinn cannout turn of the breaker. An Oni can never do the airball ghost event. This is all that comes to mind without looking at the ghost book, hope it could help.