The -103D is newer and was just released. Beyond that no one knows.
I 'm looking to possibly buy the oppo 103 or 103d, I'm wondering if its overkill for me to buy one. What I'm most interested is to use it for the upconversion of the att uverse box. I have a smaller tv, 37", that we mostly use and an older 55" microdisplay. We'll probably get a 65" 4k when the prices come down in the next couple of years. I have a PS3 that does a pretty good job with Blu-ray but it has the problem of the fan turning on really loud when showing dvds so I had to turn the upconversion off to get it to stop so it doesn't upconvert now. I've read plenty about the oppo and think I'll probably get one but was wondering if anyone had been in the same situation I'm in and if the machine was a good deal for them. I know it's great for projection but was wondering if its good for smaller tvs also. It isn't feasible to put an upconverting avr with the smaller tv, limited space.