So what is the real spiritual difference between Old Testament and New Testament?

# The OT and NT are different characteristically and practically if we see the Bible, it goes without saying. And another important view point is the difference of time zone, that OT as BC and NT as AD. Well, from time perspective or physically yes. So, than does that make everyone or every religion living/existing in NT? Again yes in terms of time zone but a BIG NO! Spiritually. For if we read the Bible and try to understand it, spiritually it has nothing much to do with the different time zones. It is about if we have Jesus Christ in us. It is clearly mentioned by Paul in 2 Corinthians 5: 17 " Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new".
Actually, thats why everyone following work-based religion are still in the OT which was based on work. The change of time from BC to AD has not redeemed them. For the redeemer is GRACE.
So, its not being in a time zone but accepting Jesus/Grace that put us in the NT- the hour of Grace. If you have Jesus you are in the NT; If not you are still in the OT just like Islam/Judaism/Hinduism and of the likes are.

# Be apart of the Grace revolution.