Sony DSC-W50 or 70

I'm going to buy an "everywear" camera. After comparing and studying the
market I decided for the W-series from Sony. I don't want to spend tons
of money for it.

The price difference between W50 (6 Mpix) and W70 (7 Mpix) is not so
big. I'm not sure the W70 sensor processes low light shots at the equal
level as the one from W50.

Any opinion is appreciated. And thanx in advance.

--
Pea C
(ask me for the right e-mail address)
***
If I have seen farther it is because I have stood on the shoulder of giants.