Can I change a 4spd A/T gearbox with a 6spd in a Kia Rondo?

I have a Kia Rondo 2.0 l, 4 speed A/T and it is a very inefficient clunky gearbox. If I wanted to change it’s gearbox for a 6 speed, would it be compatible with other more recent Kia models? Like (for instance) a Kia Cerato? Sportage? other models from Kia?

Thanks for your help.