RAMC,
I've been thinking about doing the same thing but have yet to buy any of the 47th QB sets. This is what I've observed by comparing figures of the 44th MB which I do have with photos of the 47th.
The 47th Rgmt. in the QB sets have red breeches and waistcoats, while the 44th in the MB sets have buff color breeches and waist coats. Besides the difference of paint color the 47th red waistcoats have white "tape" trim around the pockets and near the collar - This trim might be part of the sculpting on these figures but could probably be painted over without much notice.
The 47th QB has white facings while the 44th MB is yellow. The would mean only repainting the center companies cuffs and coat turnbacks, but the grenadiers hat fronts would take some skillfull painting to change.
Finally, the 47th QB buttons are silver as well as officers' lace on hats and coats. The 44th lace and button color is gold.
Hope this helps, good luck.