It's pretty much the same thing to me, but I prefer the larger venues, mixture of crowds, roster size, and overall look and feel of WWE. When you want a fast paced spot fest, WWE does it better on their weekly shows than NXT. If you want straight wrestling, WWE does it better on their weekly shows. Check how often we get "this is awesome chants" and "Holy shyt" chants past year on raw.
Just NXT is far and beyond better on "big match PPV" matches than WWE tends to be. But NXT suffers from the same things WWE suffers from. What they're doing to Apollo and Corbin is criminal. They sort of did the same thing to Breeze, and now he's suffering on mainstage. All these loses and lack of main event caliber, just hurts all three talented guys. If I've never seen Joe on TNA or ROH, I would assume he was a very boring, average wrestler. Emma deserves a title reign before Asuka (unless she's permanent in main roster now, but I'm in no mood to see her continuously lose to Asuka). NXT is a nice alternative, but it's overhyped. Not as alternative and fresh as Lucha Underground, but it's pretty much run by a financial powerhouse, so people think it's the best shyt out.
NXT benefits from less ppv's and only an hour a week, so it's hard to fukk that up up, but there have been better WWE ppv's than Takeover events (especially in 2015), and I feel like smarks are in denial or we just differ in opinions/preferences. People forget WWE it's a 3 hour show live, with two other weekly taped-shows without breaks. They do the best they can on main stage to keep it interesting and keep momentum up.
In conclusion, this is my essay.