Me, I'd want to A/B them next to each other before I assumed that just because the data tables look the same, or the style list is similar, that they will sound the same.

As I said... there's always a reason why one keyboard is less expensive than it's sibling, and often it isn't JUST features. Take a look at the amount of stated ROM in MOTL arrangers compared to TOTL (or BOTL compared to MOTL). Often there ARE the same number of patches, or fairly close, at least. To get that many sounds in that much LESS ROM, something is being removed from the sample data. Either it is compressed harder (data compressed, not audio) or looped earlier, or fewer multisamples.

And there's only one way to find this out. The manufacturers sure aren't going to tell you! You MUST A/B them at the same time. Or you aren't getting all the facts.