It is, but only when you understand that 'thing' is an indefinite noun that can take different meaning. From one perspective, the one I presented, about the mechanics of accessing content in a game by buying credits, the two games are the same. From another perspective, a different 'thing' to the one I was talking about, the design and presentation of that mechanic, it sounds like F5 is taking a more nickle-and-dime approach whereas GT6 is taking very much an optional-extra approach with no adjustment to the core design from prior GT titles.Except it isn't.
For the thing I as talking about, they are doing the same. For the thing you are talking about, they are quite different.