Yes you can from Edit Pattern of Audya....
Select a User style that you want.
Press EDIT to open Edit Pattern, and if you want to modify this style, or make a NEW STYLE from User 3/8...
If you want NEW STYLE after make it, give a name with Keyboards, and press Exit...
Select now again the new style that you have make....
Select a Variation that you want copy, for example VARIATION 1, press F9 (Copy), press F4 to select from any User or preset style the part that want, press EXECUTE to copy....
Play and try if it's ok and press Save....
Your style is ready....