I'm really not the one to be giving technical information, but I'll give it a try here, and hope that someone with better information can correct me:
1. Redbook CD is the regular CD you buy at the store. I believe that the players you mentioned above are regular redbook CD players. A redbook CD has 16 bits of information sampled at 44.1 Khz stored on it. A redbook player with "upsampling" capability can add digital noise to come up with a 24 bit/96 or possibly 192 khz signal to be processed, but it really can't add any information to the CD's information (although I do think a properly implemented upsampler such as the dCS Purcell can make a CD SOUND better). But a CD player without upsampling capability will only give you a 16 bit/44.1khz signal from a CD. There may be a reason that a true 24-bit DAC might be better at decoding a regular CD than a 16-bit DAC, but I'm not aware of it.
2. SACD does not sample at 192khz, it's some ridiculously high number. You need an SACD player or a universal player to play the SACD layer of an SACD. I don't think either of the units you mentioned can read and play back the SACD layer of an SACD.
3. DVD-A is (and I'm generalizing and ignoring the various multichannel and other capabilities here) a pcm-based 24 bit/96 khz medium, which requires a DVD-A player or universal player to decode at this time (I think some DVD players can play them too, but I don't know if they can fully decode the 24/96 signal). There is also another 24/96 medium out there, the DAD (principally available from Classic Records and Chesky), which is DVD-video based and likely to be left by the wayside in the high-rez wars, can play on a regular DVD player (not a CD player, though) and can, if your DVD player has a digital output that can output a 24 bit/96khz signal, be played through an external DAC with 24/96 capability. I think, and someone please correct me, that DVD-A still has an encryption scheme in the software that prevents a 24/96 digital signal from being passed from a DVD-A player, so you can't currently use an external DAC to play a DVD-A disc.
4. HDCD is a 16 bit/44.1khz medium, with some special encrypted signal or something manipulation that does make a sonic difference from the standard redbook layer but requires a decoder in your CD player to reap all its benefits.
This is really basic, and pretty confusing. Bottom line is that if you buy a redbook CD player, you won't be able to play anything other than CDs in it; if it has 24 bit DACs in it and 96khz sampling capability, it can possibly sound better than a standard CD player, but you should check the archives under "upsampling" to get an idea of the controversy around that process.
1. Redbook CD is the regular CD you buy at the store. I believe that the players you mentioned above are regular redbook CD players. A redbook CD has 16 bits of information sampled at 44.1 Khz stored on it. A redbook player with "upsampling" capability can add digital noise to come up with a 24 bit/96 or possibly 192 khz signal to be processed, but it really can't add any information to the CD's information (although I do think a properly implemented upsampler such as the dCS Purcell can make a CD SOUND better). But a CD player without upsampling capability will only give you a 16 bit/44.1khz signal from a CD. There may be a reason that a true 24-bit DAC might be better at decoding a regular CD than a 16-bit DAC, but I'm not aware of it.
2. SACD does not sample at 192khz, it's some ridiculously high number. You need an SACD player or a universal player to play the SACD layer of an SACD. I don't think either of the units you mentioned can read and play back the SACD layer of an SACD.
3. DVD-A is (and I'm generalizing and ignoring the various multichannel and other capabilities here) a pcm-based 24 bit/96 khz medium, which requires a DVD-A player or universal player to decode at this time (I think some DVD players can play them too, but I don't know if they can fully decode the 24/96 signal). There is also another 24/96 medium out there, the DAD (principally available from Classic Records and Chesky), which is DVD-video based and likely to be left by the wayside in the high-rez wars, can play on a regular DVD player (not a CD player, though) and can, if your DVD player has a digital output that can output a 24 bit/96khz signal, be played through an external DAC with 24/96 capability. I think, and someone please correct me, that DVD-A still has an encryption scheme in the software that prevents a 24/96 digital signal from being passed from a DVD-A player, so you can't currently use an external DAC to play a DVD-A disc.
4. HDCD is a 16 bit/44.1khz medium, with some special encrypted signal or something manipulation that does make a sonic difference from the standard redbook layer but requires a decoder in your CD player to reap all its benefits.
This is really basic, and pretty confusing. Bottom line is that if you buy a redbook CD player, you won't be able to play anything other than CDs in it; if it has 24 bit DACs in it and 96khz sampling capability, it can possibly sound better than a standard CD player, but you should check the archives under "upsampling" to get an idea of the controversy around that process.