The bases for Christianity is found in the New Testament. Justin was a Christian Martyr who professed and strongly believed what Jesus taught. Justin compiled a summery of Christianity into a book he called First Apology. A document written between 155-157 he wrote it primarily for Emperor Marcus Aurelius of Rome because he was a harsh persecutor of Christians.
One of the main themes is that God is sovereign, His laws are great and He is good.
Since Justin got his beliefs from the New Testament it is easy to compare them.
In the New Testament Paul talks about how loving his God is, he says that God will proctect and provide for us and he tells us that God is a good judge. He says that loving God and living a good and honest life will earn you eternal life in Heaven. But if you don’t love God and live a dishonest life you will go to hell.
In conclusion, they are very simular.