Just some thoughts about the sequence (SMF) play and style (also sequenced) play.

There are benefits for both..

Styles allow freedom to change variations, fills etc..and mixing up chord changes..
it also allows for a style change (swing to bossa)..

But very few people will use style play in this manor..and usually play a tune identically..
every time..

SMF play does many of the same ...Instead of variations and fills,

a sequence uses markers (if you have never used markers ..you are missing the boat) .

Here is where SMF play edges out style play..realtime altering of parts, to be played live.
muting or
removing tracks..
are easier done in realtime than many arranger keyboards allow for styles.

16 seq parts plus realtime parts of a sequence can be used and altered..in real time.

only 8 in a style..

Another benefit for using sequences...being able to add lyrics, and viewing during playback.

I find this to be such an advantage, that I record my style play as a sequence, so I can add lyrics,
and additional realtime parts the style does not cover..

Roland keyboards allow a few more features..like changing up a sequence play with "Cover"
or "make up" tools..again in realtime..They can change the overall sound instantly..

Make a dance tune into a big sound to fill a dance floor (punch)..

The Roland features work with both style and sequencer..

There is room for both types of play..and you are not taking advantage of your keyboard,
if you don't use both.

When backing a guest singer, unless they are use to singing with sequences,
it is better to use a style..even then,
sometimes it is better just to back them with piano..