Not everyone who liked the old SA games would like the Secret-Rings/Daytime gameplay because the focus is on a racing/platforming hybrid rather than a standard platforming game. However, on the Wii version, the Werehog levels later in the game provide far more emphasis on platforming than combat, to the point where I would look forward to them to make up for the fact that the daytime level went by so quick.
Besides that, there are plenty of extras which will extend the amount of time spent in daytime, if you are lucky you may even unlock some alternate paths like the dune buggy in Shamar or the real dragon road in Chun-nan.
Whether or not the Wii version or the PS3/360 version is the better buy would probably be a matter of preference. The Wii version is very accessible, with each werehog level being split into three or four acts instead of being done all in one piece. The PS3/360 has a much slower form of progression, but with it, there is far more content.