ok im living in london.. where is better (life, carrier, weather!) ? should i move to nyc? (i need a visa though)

The two cities actually aren't very much alike. The two cultures aren't very much alike either! It's a false parallel. New York is much louder, busier, and less "villag-ey." The people are much friendlier and more honest, but also louder.

They're two good cities, but VERY VERY different.

Everything that Red says plus London is much more expensive.

I would agree with all of the above. Two different cultures that can't be compared. I love New York, but don't know if I could live there or not. It's a bitlike going to a sweet shop.

At the end of the day it's where you feel most comfortable, and where you think you might fit in.

Come to NYC for at least a week and stay in one of the residential neighborhoods, eat in local restaurants, go to local bars, etc. and you will see for yourself if you like it.

Knowing both cities well I would live in NYC in a heartbeat over London!

I only wish I could...

There are MANY parallels with NYC and London

Both melting pots (London more so)
Both centres of finance/fashion/art/culture
Similar transport system (London's better overall, but NYC is much cheaper.
Both very expensive.
You can compare many residential areas - Notting Hill/Brooklyn - Williamsburg/Shorditch/Hoxton - West End/Manhatten - Brixton/Bronx - I could on.
When I'm in NYC, I'm always reminded of London.
Both world cities.

NYC is nice, but nowhwere can mix a bustling metropolis with centuries of history on every street corner like London can.

The weather in LONDON is worse than in NEW YORK.

I would disagree with that, I think that they goth have bad weather but at least London isn't so horribly humid in summer and it is amazingly short in both cities.