Holy cow. The picture quality is exactly the same between the SE and the Superbit. Can't say anything for the DTS track (which I'm willing to bet sounds exactly like the DD), but I'm glad I stuck with my 3-disc SE and didn't "upgrade" to the Superbit. I still have the first, single-disc release too.
"The grin on my face at this point was not about what was happening on screen, but at the sheer impact this opening was having on me in terms of sound quality. Switching back to chapter one at this point and engaging the Dolby Digital (448kbps) sound mix was disappointing to be honest. The intense feeling built by the DTS (768kbps) track is simply lost on the Dolby version, with the bass line suffering the most. You just don’t have that grin on your face with the Dolby Track."
"...this DTS track just sounds utterly breathtaking."