I'll try to answer all your questions.
1. That is the rumor, but it has never really been proven.
2. The last year 4WS was produced in the United States was 1994.
3. Leather was an option from 94-96 and came STANDARD on 94-96 Prelude VTEC models. I don't think leather was option on 93 models.
4. OBD II stands for On Board Diagnostics II. All the newer cars have to have OBD II because of stricter emission laws. People don't like it because cars that have OBD II don't react as well to modifications. After adding a modification, the OBD II system will eventually reprogram itself back within factory spec which robs you of horsepower. OBD II was introduced in 1996 and anything previous was OBD I.
5. That rear storage compartment that you are referring to is only found on the 1992 Preludes. 1993 Preludes have no storage whatsoever (just the glove box, which you can only fit a few papers in). The 94-96 Preludes have a storage compartment located between the two front seats. They also received a cup holder which was well needed.
Here you can see the storage compartment and the cup holder which is in front of the storage compartment.
6. Not sure what you are asking.
A few other pieces of information which might be helpful are:
• 94-96 Preludes came with clear/orange front turn signals. 92-93 came with all orange signals.
• 94-96 Preludes came with lighter directional wheels. They weigh in at 18 lbs. while the 92-93 alloys weigh in at 22 lbs.
• 94-96 Preludes came with an electroeluminscent speedo, tach, and odometer (has the same look as your gas and temp gauge).
• This is a small thing but the small grills beside the headlights were different in the 94-96 Preludes. 94-96 had two lines going through them while the 92-93 had only one line.
• 92-93 Preludes have the power mirror controls on the door panel while the 94-96 models have it in the center console (which can also be seen in the picture above).
• 94-96 VTEC models came with a 7th speaker which was located between the two rear seats. This was a 6 X 9" sub which is powered by its own small amplifier.
That's all I can think of right now.
I would definitely look for a 94-95 Si or VTEC model (preferably a VTEC model, but they are very rare).
Good luck with your search.
Mark