Nope, the model 98 has the same action as the model 91, it is the thunderbolt that has the bolt action. The main differences between the 91 and the 98 are that the model 98 usually has a Clerke barrel and the model 98 does not have the underrib. I thought all the model 91's still used the Williams sights. This one must be a late model 91.
Of course, with White rifles there are exceptions. A lot of them are unique in one way or another.