The manual is on absolute " dry " mode as if they were pissed to even describe controls
Bank A and B ( 128 presets each ) explore the FS1R features ( more or less ) , the other banks are ports from the other synths ( using 6 ops ) and monotimbral so you have to figure ( browse output levels ) the operators that are off depending of algos.
Personnally I kind of fell asleep while browsing a lot of samey presets ...
Even with the great and free editor there are so much layers and ( unnecessary / not very potent ? ) controls that you spend a massive lot of time to move the sound, because you have to browse a lot to figure the key parameters on a given preset.
I've never owned a DX7 but *only* based on the sound files I downloaded, DX7 sounds more warm so not sure you can find exact matches if you crave for them.
I like it but I'll never love it.