it's fun, it's familiar what with having mostly all the same faces (and darcy seems to have slotted in relatively well, even if there's something i don't quite like about her), everyone clearly gets on and has great relationships - evident in all the banter they have with each other. it's a higher standard of talent really too, given that you can really see how much they all work, the originality in each routine and the improvement each week. x factor contestants seem to stay at a particular level throughout.
i also like the judging system a lot better. 4 objective judges, each with their own distinct characters that ALL bring something to the table (rather than just gary [voice of reason who can often give technical feedback] and nicole [brilliant eccentricity. may not be quite sure what she's on, but it's entertaining to watch. sometimes a hot mess] on x factor) they don't have any kind of mentor bias, which also eliminates the inter-judge fighting, so they can each give their own honest opinions, but still work as a unit.
an overall lighter, warmer, more family friendly feeling to finish and voila.