I recently changed from a 2016 Tiger 800 XR.
I liked the triumph it was very comfy, reliable and practical and decent value for money, but i never quite fell in love with it.
In the end i went with my heart and sacrificed a little bit of the above for the additional character and performance of the Ducati. I certainly don't regret it.
The engines are very different, and wind protection can be a big factor in how much you enjoy each bike (Triumph is notoriously bad for a lot of people) so well worth test-riding both.