How are newer religions similar/different than older religions?

Question

Newer religions being Christianity, Buddhism, Hinduism, Islam etc.
Older religions being the New Religious Movements (cults) that are seen today, such as Rastafari, Jehovah's Witnesses and other end-time religions, Mormon Church, Santeria, etc.

Just trying to get some ideas...

Answer 1

The Christian Congregation of Jehovah's Witnesses is not a "cult".

Jehovah's Witnesses are Christians who understand the Scriptures to teach that God's Kingdom by Christ Jesus is a real government which will soon replace all earthly governments.
(Daniel 2:44) God of heaven will set up a kingdom... It will crush and put an end to all these kingdoms, and it itself will stand to times indefinite

That Kingdom will rule over the vast majority of mankind, most of whom will have been raised from the dead after Armageddon.
(John 11:23,24) Jesus said to her: “Your brother will rise.” Martha said to him: “I know he will rise in the resurrection on the last day.”
(Acts 24:15) There is going to be a resurrection of both the righteous and the unrighteous.

Until that resurrection, there is no suffering in "hell", or the grave. Sometime after the resurrection, death and "hell" will themselves be destroyed.
(Ecclesiastes 9:5) For the living are conscious that they will die; but as for the dead, they are conscious of nothing at all
(Ecclesiastes 9:10) there is no work nor devising nor knowledge nor wisdom in Sheol ["hell"]
(Revelation 20:14) And death and Hades ["hell"] were hurled into the lake of fire

While a limitted number of humans will be resurrected to heaven to share in ruling over mankind, the vast majority (literally more than 99.9%) of Jehovah's Witnesses expect an EARTHLY hope, the same hope given to Adam and Eve.
(Genesis 1:28) God blessed them and God said to them: “Be fruitful and become many and fill THE EARTH and subdue it [caps added]
(Genesis 2:17) You must not eat from it, for in the day you eat from it you will positively die [so never eating from that tree means never dying]

Interestingly, the Scriptures are full of references to this earthly hope.
(Psalms 37:11) 'the meek will possess the earth'
(Proverbs 2:21) 'upright will reside in the earth'
(Isaiah 45:18) 'God formed the earth to be inhabited'
(Matthew 5:5) 'the mild will inherit the earth'
(Revelation 21:3) The tent of God is with mankind

Learn more:
http://watchtower.org/e/lmn/index.htm?article=article_10.htm
http://watchtower.org/e/rq/index.htm?article=article_06.htm
http://jw-media.org/beliefs/trueworship.htm
http://watchtower.org/e/jt/

http://watchtower.org/e/dg/index.htm?article=article_11.htm
http://watchtower.org/e/pr/index.htm?article=article_07.htm

Answer 2

One big difference is that the oldest religions (e.g. Roman mythology) are polytheistic; later ones (e.g. Judaism) are monotheistic.

Another difference is that while older religions have, generally, adapted to circumstances, modern religions (e.g. Scientology) are often crackpot, or more a way for their founders to make money than a way of life morally superior.

Answer 3

I agree with Jenne and would only add that early christianity is a combination of both Roman, Persian and Judaic mythologies.

"Newer" religions are merely variations of old, just as before.