It gets even weirder. Why would you want to compare the decimal representation of an address with the hexadecimal representation of the private key that generated that address? Obviously you cannot do this for the same reason, the hash is not reversible.
@BlueExodus, is that what you are asking? To find duplicate private keys with the same address? You have not clarified it enough.
Nope imagine like i derive btc address from a number, cause every 256bit number has its private key hex, btc address compressed and uncompressed with their wif private keys and public keys... Like that i derive the 256bit number from that btc address, private key hex is easily not to say derived but convertable to 256bit number since decimal representation is number associated with private key hex in numerical form.