That'd be down to the settings surely and how much you moved the sliders? What I've found is that sometimes it can remove the vibrancy even without moving the colour noise slider.
I'm not sure how well this will show on here, but these are 1:1 crops of Topaz vs Lightroom's Denoise, I've had to add vibrancy back to the blues on the Topaz image here. My only gripes with the lightroom denoise is that you can only full full screen or mega zoomed in, and there's no mask function (that I've found at least)
Topaz by
Toby Gunnee, on Flickr
Lightroom by
Toby Gunnee, on Flickr
I can't get super resolution to work though for some reason, even following the instructions online, i.e. right click on the image and select enhance.