It depends what you want. To me, it is better because:
1) UI super smooth. App launch fast.
2) Very good browser (UI not so good...)
3) Screen is of good size and decent resolution.
4) Much stronger PIM and Email.
5) More apps.
6) Better OS support (10.0.10 is out, and 10.1 is rumored to come in March/April)

I still like N9 and think its swipe UI is still the best thought-out so far, but ultimately the lack of Nokia kills it:
1) UI too slow at times. FasterN9 and overclocking help but cannot hide the slow GPU.
2) Browser starts to stutter when browsing some of the newer html5 sites.
4) Fenix(Email) is crap, everyone knows it.
5) Decent app for a dead platform, but few new apps are being developed since developers shifted to BB10 or Jolla.
6) Dead platform....