Which phone is better - Nokia 6300 or Nokia 2630??

I'm 13 and I need a new phone, I've had my other one for about 2 years.

With O2, are Nokia 6300 and Nokia 2630 billpay? How much are they in euro?
And also, what is Pay monthly and Speak Easy??

In the phone, both have bluetooth (which I need). In your opinion, which is better?

Thanks