By coincidence, I have Sirrus, Secteur and Tricross.
The Secteur is road but has a very similar frame shape to the Sirrus and you'd easily look at them side by side and say they were comparable. However, I'd say the Tricross shares more of the multi-use benefits of the Sirrus but it's probably six against half a dozen.
I should also say, though, that our Sirrus is the basic model with 700x32 tyres, rather than the more specced out bikes in the range, most of which come with 700x28s. The lighter Sirrus models are probably more equivalent to the Secteur.