Hi Toril,
You have to try it out, it is a kind of hit-or-miss thing. There are a few rules to observe, though.
First of all, the styles should be less than 50KB or they won’t load. Secondly, they need to be in SFF1 file format, the E463 won't read SFF2 files.
Thirdly, it is best to avoid styles with Megavoices and SA voices since the E463 doesn’t have those.
Jørgen Sørensen has made various software to tweak styles, you might want to check those on the main PSR Tutorial website in the Software section.
As for the fact that the E463 styles only have 2 variations, as long as the files are not larger than 50KB this shan’t be a problem the E463 will simply read variations A and B, Intro 1 and Ending 1. If you need, say, Intro 2 and Variations C and D and Ending 3, you could always copy the variations you need in a new style as variations Intro 1, variations A and B and Ending 1, that way the E463 would have access to them.
What you also could do is remap the voices in the style because if you read a PSR S style in the E453, there are chances that the mapping of voices will be wrong.
Styles which are using XG voices will give a better result than styles which use panel voices, because the E463 is XG-lite compatible, so in this case the mapping of voices will be correct.
The best thing to do probably is to take any style that you like, which is in SFF1 file format and smaller than 50KB, copy it onto an USB stick, then upload it to the E463 and listen to decide whether you like the result. The E463 won’t read the styles directly from the USB stick, you will have to copy them to the keyboard. The E463 can store 10 external styles at a time.
In the past I had the PSR E433, the older version of the E463, and I was able to upload many styles to the keyboard. Sometimes the result was strange, but sometimes it was also very good.
Hope this helps,
Vinciane