1. Blitz 3d Runs on DirectX 7, while DBP runs on 8.1 (9 with U5), thus there is a speed difference. This is what has turned me away from Blitz.
2. Blitz 3d is $100 US currency, while you can DBP for that much.
3. Speed in Blitz and Darkbasic really depend on the user and PC, BUT i have found DB to be somewhat faster in instances of higher Poly models.
4. The Blitz Error checking system has it's errors, but it still works.
5. Blitz has a very Sh*tty help system, it requires you to have some understanding of the basic language, and programming.
6. Blitz is an electronic Download only, so you won't have a CD or instruction/refrence manuals.
Thats all i can think of.
In the end it is down to personal opinion what you want. My opinion ended up being DarkBASIC.
I'm sick of Signatures