I don’t have the Target software so can’t model the Adaptive Phonak Digital for you. Here are some of the others. What I find is that these prescriptions cannot really be generalized that much. They “react” differently for different losses. What the formula does for you can be quite different that what it does with a different shaped loss.
NAL-NL1: This formula is the earlier version of NAL-NL2. As you can see the low frequencies are attenuated somewhat, while the midrange has the most gain. It also has the most compression, which is the difference between the top (soft sounds gain) and the bottom line (loud sounds gain). The high frequencies are kind of rolled off and have no compression. You may hear that as a loss of the detail and the air, as you need a fair bit of gain there.
NAL-NL2: This is the updated version, and is more commonly used. Notice that it is a smoother gain across the whole frequency range from 500 Hz up. There is also a lot of compression used from 500 Hz up. This one should sound more lively and brighter than NL1 in my opinion. It can be set for child or adult, as well as for tonal and non tonal. Tonal is apparently used for those speaking Asian languages where the same sound at different frequencies apparently has a different meaning.
DSL v5: I have to disagree a bit with DrLaura on this one. While it was originally developed for children it has been updated a long time ago to have a correction for either children or adults. It is currently on version 5 of the updates. This one has a steady increasing gain vs frequency with the most gain of the three at the highest frequencies, It also has the least compression. Soft sounds are not going to be amplified as much, and loud sounds amplified more, although the compression reduction is more on the soft side of the normal sounds.
I have an appointment at Costco for next Friday and I am going to give DSL v5 a try. I am currently using the Rexton proprietary SmartFit which is fairly similar to NL2. It is pretty good, but I am annoyed by distant sounds seeming to be too loud. For example if someone flushes a toilet in the bathroom down the hall, it sounds too loud to me, and competes with normal sounds in the room I am in. It may be a big bust, but I am going to give it a try.