Well, the differentiators are:
1. display quality (How good images look), and
2. 3d chipset performance (How fast it can run games)
The Parahelia has excellent display quality, but the 3d chipset performance is definitely substandard when you consider the price of the card.
The Radeon 9800 has excellent display quality as well, but most reviewers say that the Matrox cards are slightly better. On the other hand, the 9800's 3d chipset performance rocks the Kazbah.
- Cleeve