
Photoshop
Things I prefer:- You can see the pixels and edit them in more detail
- Has a better menu layout
- Has a more professional looking layering system
Things I am not too keen on:
- Some of the tools aren't as easy to access as they are on Illustrator

Illustrator
Things I prefer:- The layout of the tools are clear
- You can have a larger variety of colour
Things I am not too keen on:
- It is really simple to do something wrong, but it is a lot more difficult to put it back right.
- You can't edit things in as much detail
Which is better?
Well, for things, such as logo design, using Illustrator is better because it is like a piece of paper that you can draw on, where as Photoshop would be editing images into other images. Photoshop is formatted with pixels where as Illustrator uses vectors.