Hi Alan,
A lot depends on what type of photography you are focusing on, forgive the pun. If it is serious imaging you are after then you are better off with a DSLR.
The advantage of the Sony being a DSLR then you have the opportunity to add other lenses. Also the one thing that the Sony has that is adventagous is the image stabilization built into the camera body. This is not something you find in a lot of other DSLR's. It is also worthwhile checking on the types of memory card used by both cameras as cards can differ quite a bit in price. Bear in mind that the DSLR does not have a video mode. As you mentioned it's not all about pixels, it's the image sensor that makes the difference.
I have a Sony A100 DSLR with five additional lenses, but I am a bit of a camera buff. Having said that I use a Sony 12.1 mega for most of my candid photography.
Like most things in life, it's what you are comfortable with. Hope some of my rantings help.

Eddie