Hi! Should I buy a Sony T11 or W1 digital camera?

Both cameras are in essence the same , a few rules of thumb are 

- it is not the megapixels that count it is the size of the pixels on
the chip that count , bigger is better

- as with every camera the lens is what makes the picture , a better
lens is a better picture

- look into the type of battery used (the more exotic the more expensive)

- buy a camera that fits your needs eg. you do not need the best and
the most expensive one if all you are going to do is shoot family
pictures once in a blue moon