I have both, I am selling my TT and keeping the NA. I think that speaks volumes for the car in itself.
Don't be put off by all the crap that you should have an NA (or other rear wheel drive car) fisrt before getting a TT. They are pokey in standard form and do need to be driven with obvious caution but there not rocket ships.
Personally, I thought for a car with near enough 330 BHP and that amount of torque that it wasn't as quick as I expected.
The TT insurance is often cheaper, it was for me, Im 25. It really depends what you are after budget wise and performance wise.
The TT is easy to extrcat big power, but the NA does not have many mod option at all. Except NOS.
I found that using the TT as a daily driver was a bit of a waste and a fair amount of money to be tied up for the 2% of the time I felt like giving some welly.
For me personally, I think the NA is the better option, feels faster around the local roads and still has the looks.