By Pro Arte, do you mean their nylon set of strings or something else? They do fluorocarbon strings under that name as well.
Also those Titanium strings aren't actually fluorocarbon but rather a different type of monofilament material. Brighter than nylon but still similar in terms of gauge and stretchiness.
Regarding the original question, I would definitely try both fluorocarbon and nylon strings. They position themselves at the opposite sides of the spectrum in terms of brightness and gauge, fluorocarbons being thinner and brighter and nylons being warmer and thicker. However, fluorocarbons are superior in terms of stability and intonation. The stretchiness of nylon causes some issues in both of those aspects. Aquilas, or at least their nylgut strings, sit in between of those. I would definitely try both fluorocarbons and nylons, especially if you play the longer scale ukes. For sopranos, I almost exclusively recommend fluorocarbons.
edit.
Also, I wouldn't describe fluorocarbons as having more tension than other types of strings, at least if you're not using a high tension set specifically. The tension feels very similar to other typical nylon or nylgut strings. Of course the tension is greater per volume but since the strings are thinner the overall tension is, or at least feels, about the same.