The cassettes arrived. I made a test recording. Soundwise, it's similar to the SuperCDing, a kind of SA. It has the sound signature of SA: drop of the mids and starts compressing a few dB over the Dolby level. Quite good detail but not as the "old good stuff". Manufacturing quality is very good. It has the classic clear shell of the '90s D which is exceptional, IMHO. No railroading neither any residue on the heads. No dropouts and no w&f issues.
Overall, a very good cassette but not a special one.
As for the initial question, I believe I made a good choice.
Thanks for the help!
Arriving a bit late on this thread but I am glad your CDing2 turned out to be good!
My own experience with later versions of TDK "budget" type2 models was very hit and miss...
A few years ago, I happened to buy a few 10x boxes of (later version) CDing2 and DJ2 for very cheap from a shop who was going to close and so he offered me such cassettes at less than 1 eur each, then I had got them all.
Anyways, some of them worked nice, others did show serious issues (even into the same 10x sealed box!)... like wobbly (non round or not well centered hole) small rollers at the lower corners of the shell and/or lubrificant breakdown in the shape of transparent (not visible) waxy/sticky residue on the transport but which was easily hearable like very heavy modulation noise... a sort of very harsh hiss noise which is proportional to the recorded signal (then it's not constant but it comes and goes just together with the recorded sounds), so that with no recorded signal you have no modulation noise but as soon as you record on tape you get such harsh noise, and then they are simply not useable.
At now, I still have quite a few of such TDK tapes still sealed also because they aren't inspiring me anymore.
Anyways, if you just recorded on some and they sound good and clean without a weird harshness on treble like I described above, then your ones would be good.... I wasn't that lucky with such models.