rusty.
heres what i did.
1. i froze the traks in my original style.
2. then deleted the drum rt and then forced midi on drum trak.
3. now heres where it gets tricky.
i loaded midi style i liked , BUT i had to reset tempo to my tempo in step one if tempo of midi style was different.
my frozzed RT's were still there , but had turned yellow ,
BUT WERE STILL PLAYING BACK NOW WITH THE MIDI DRUM.
its sorta tricky.
the KEY i found is to freeze the traks you want in the original style.

frankly what i do in these cases is have 2 biab files.
one for each style, and export to my multitrack software and sort it out there.
so lets say my 2 styles are,,
rusty rock full of RT's and rusty rock midi full of midi style. i would export the rusty rock RT's to the daw as
individual traks. then rusty rok midi to my daw.
then sort it out in my daw , for example useing the jamstix
plug in if i had it on the midi drum trak in the daw.

hth.
oldmuso.

my songs....mixed for good earbuds...(fyi..my vocs on all songs..)
https://soundcloud.com/alfsongs
(90 songs created useing bb/rb)
(lots of tips of mine in pg tips forum.)