i think the DC had better graphics by a small margin. silent scope and alone in the dark the new nightmare looked better on the DC. and one never saw a game as vibrantly colorful as Vigilante 8 second offense on the PS2. the dreamcast's dithering artifacts werent at all apparent (to me anyway) unless played in progressive scan (then they were really apparent), Shenmue II had terrible texture shimmering, and the PS2 had some good special effects, but no one could outdo Sega and that is not just my opinion.
anyway, i just cant believe that sony went through all the trouble they did to create the GS when they could've just used off the shelf components like Sega did. they could've just used a power PC, an SB live (guessing it could play nicely with a Power PC), and a VSA 100 (i know they made them for macs at the time so it could definitely work with a PowerPC) clocked really high (although if they were going to clock a VSA-100 really fast, then they probably would've been better off licensing it from 3dfx so Sony could've had it made on a 180 nm process). the GS had some strengths (like a 32 bit fixed point z-buffer), but the 4MB of embedded memory meant it would hard to make room for 32 bit textures.
but in the long run i guess it didnt matter what Sony used in the PS2 given that it was the most popular console of its generation (and still one of my 5 favorites).
anyway, i just cant believe that sony went through all the trouble they did to create the GS when they could've just used off the shelf components like Sega did. they could've just used a power PC, an SB live (guessing it could play nicely with a Power PC), and a VSA 100 (i know they made them for macs at the time so it could definitely work with a PowerPC) clocked really high (although if they were going to clock a VSA-100 really fast, then they probably would've been better off licensing it from 3dfx so Sony could've had it made on a 180 nm process). the GS had some strengths (like a 32 bit fixed point z-buffer), but the 4MB of embedded memory meant it would hard to make room for 32 bit textures.
but in the long run i guess it didnt matter what Sony used in the PS2 given that it was the most popular console of its generation (and still one of my 5 favorites).