Not at all the same. In the case of Pluto, the matter was one of definition: by some definitions of the term 'planet', Pluto qualifies and by some other definitions it does not. The point is that the term 'planet' is a word that we use to help us understand the universe and picking the best definition is, in part, a matter of opinion. But once the definition is determined, so is the answer to the question of whether Pluto is a planet.
Part of the problem is that we have discovered quite a lot of balls of ice orbiting the sun and Pluto is not the largest. Pluto is also in a very strange orbit compared to the 'standard' planets. We also have to consider manner of origin and a number of other factors.
The question of whether a rose smells good is not simply a matter of definition. It is something that can vary from person to person. So it is a matter of *opinion*.
Glad you got the point.
If a planet is a definition, voted on as an opinion and declared a new definition, which displaces Pluto,
then the smell of a rose is "always" an opinion of an old definition.(To always have an opinion of something, without it changing, makes it subject to individual interpretation, but not its "always".)
Sort of like infinity plus one is still infinity, or infinity minus one is still infinity....