I've played Banjo-Kazooie, Banjo-Tooie, and Donkey Kong 64. (Along with several other collect-o-thon games.) They all play differently. I don't doubt PlayTonic will figure out something new. Heck, they've already explained that collecting pagies will make the levels larger, expanding out new areas to explore. That was never in any of these games.
Seems it may also play mostly like Banjo-Tooie, going by what Mr. Kirkhope was saying before "Project Ukulele" was a thing, which I have no problem with. The reason being is that I would expect the smaller projects like A Hat in Time, Happy Hell, and Lobodestroyo to be more like the ever-smaller "Kazooie". Heck, even Clive 'N' Wrench, if that finally gets off the ground.