This game fares better than The Sands of Time mainly because it's newer and had both PC and Xbox versions out of the gate. Unfortunately, this game also suffers from the half-assedness of TSoT HD version, however, luckily there are no problems with balancing issues for the sound!! Prosit!!
On the other hand, the game is blatantly just upscaled. There are no new textures and even the menus and menu fonts are pixelated due to the stretch to an HD resolution. It's pretty pathetic to see the textures on the characters (apart from the prince) being so blocky and low-resolution. I'm also realising now that TSoT version on this Blu-ray is probably cribbed from the PC version and any improvement in texture and resolution i was seeing was from that version (which i didn't play).
I'm guessing that Two Thrones will tell a similar tale and to be honest it's quite dissapointing. There's nothing new or extra for this release, and the poor implementation of this HD/3D version means that none of these games have been treated with the respect they deserve or respect for the customer at the price at which they've been released. Myself and Tboon talked about HD re-releases not long ago on the podcast and one of the things that came up as a positive was allowing new fans to come to the series and experience good games. I'm not sure, if i didn't have nostalgia to help me along, that i'd want to play or buy these games that look so much worse than anything current gen in just a less-muddy resolution.
This is not the way to do an HD update.
However, there are some franchises i would love to see in an HD offering. I would love to see Silicon Knights and Crystal Dynamics revive and release their Soul Reaver/Legacy of Kain series. I loved those games back in the day and would love to see Soul reaver 1, 2 and Defiance and possibly also the two Blood Omen games in one package on the PS3.