What is the difference between Adobe Photoshop and Photoshop?
CorelDRAW is a vector drawing illustration application, while
Photoshop is a raster (or bitmap) image editing and painting
application.
Vector drawing uses mathematical equations (inside the program,
the user doesn't have to worry about the math) to define the lines,
curves, angles, etc. of a line drawing or collage style image.
Raster or Bitmap images define the color properties of each
individual pixel of an image, for pictures more like paintings or
photographs.
Vector drawings can be less "realistic" looking and more
illustrative. Vector drawing is ideal for line drawings, logos,
diagrams, plans, charts, maps, and so on. Due to their mathematical
properties, vector drawings also scale without loss or distortion,
while bitmap images become distorted (pixelated, jaggy) if they are
enlarged or reduced (much).