Hi Antony,
The Revell Saucy/ Snowberry is basically Bluebell, with minor differences.
I built my Bluebell when it was issued under the original Matchbox label, and the Snowberry when released by Revell.
The kit differences are fairly minor, but to do a proper conversion to Snowberry there is a change in the porthole configuration, and the Radar lantern is probably the biggest noticeable difference. The carley float arrangement is also different, and of course the camouflage scheme is also different
If it's any help to you here are photos of Bluebell and Snowberry that show key differences.
These show the differences in the radar lantern, Snowberry top and Bluebell below.
Here the different carley float arrangement can be seen.
Note the wooden decking , this would also apply to Snowberry.
Finally a broadside shot of Bluebell.
Both these models have been enhanced with after market items and scratch built deck furniture in the case of Snowberry.
IF you intend to do an r/c conversion a search of the web will bring up information, but such a conversion may well have to sacrifice some detail for practical reasons if you are to sail her.
Hope this helps