Based on the description above, it seems like you are interested in these two breads, but you have doubts about each.

• Doubtful about sweetened condensed milk because you are worried about artificial ingredients and a taste that is too sweet.
• With chocolate tissue bread, even though you like chocolate, the surprise of "Muscovado sugar" in the wrapper makes you confused.

Considering that you seem to be interested in the taste of Muscovado sugar and also that you like to be adventurous trying new flavors like condensed milk so you know the taste, in my opinion, you might choose chocolate rolls with Muscovado sugar.
Curiosity about the taste of muscovado sugar will likely outweigh your doubts.