CrPC vs BNSS: Unnati aur Nyaya - kaun doosre ke samaan hai?

Yaar samajh nahi aaya, maine socha tha unmein ek se badhkar hi kya difference hai, lekin ab mujhe lagta hai ki yeh dono kaafi similar hain... Unnati ko BNSS mein mention kiya hai aur Nyaya ko CrPC mein, par yeh dono ke saath-saath hi use kiye gaye hain. Unnati ka matlab hai ki aadmi ko koi bhi court ke andar khada karke bhi case start karne ki ichha thi, isey kehte hai 'innovation' ya 'progress'... par yeh kya hai, main samajh nahi paya. Koi bhi example de do jo mujhe sahi rasta dikhaye. Please help!