simple, if its over promising its shit coin, if its just some pump and dump tool its shit coin and also if it doesn't have product and also imitating other meme coin then its shit coin.
differentiating one is actually very simple, some people that used to shitcoin will know its a shitcoin instantly.
I don't value wasting anytime on shitcoin because it have taught me horrible lesson in the past. Shitcoins have become the trends of the market, everyone talks about it and there's enough traffic when it comes to shitcoins. I actually don't understand the full comprehension you're trying to generate here, all I can I see is that, you're trying to sort out shitcoins by mutual consent. There are different techniques that can be used to ensure that a project is purely a shitcoin in the system. Shitcoins pumps and dumps heavily within small range of time and most shitcoin doesn't survived the bear due to their instability and high volatility.