The ss3202 does not have the 2nd award programmed into the REEL prom.
The award of 400 credits is not listed in the programmed awards.
All of the payouts listed in that PSR are the payouts based on a single coin, except for the top award where it specifically lists the payout for the first and second coins separately.
The 400 coin award you're looking for is simply the 200 coin award multiplied by the number of coins wagered (see attached image).
The only difference in the SS chip numbers you mentioned that specifically call out a second coin award for that combination is that the 400 coin award is labeled as being progressive eligible. That is, it would permit you to have a second level progressive set up for that award rather than only paying the 400 coins.