My goal was to summarize things that Naz does well or better. I did not intend to claim her to be better by pointing out what the others lack... And. yes I'm following Nilay as well...If Nilay were as good as you claim, she'd not be the second setter behind Ozge at the Vakif team. Nilay does show good setting flashes at times but has never been a consistent setter. Her location and hittability is often lacking and consistency leaves a lot to be desired. In addition she's a big liability as a blocker and I do not see her being as great a defender to be able to make up for this. Both Nilay and Ozge are lucky that they play with spikers who're willing to work to hit the not so good sets. That's not always the case for many players and teams.
You ask what Naz has that the other two lack. She has a consistency and a level of play that the others lack. She has better location, better set selection and a better sense of the game. Her overall contibution to the game when she's on court is a lot more than the other two. I expect you've not seen the stats of the WCH or the last matches of Fenerbahce to claim that Naz sets a slow ball to triple/ double blocks. The meaning of a "running set" is that there's a single or no block in front of the attacker and for the national team, even though everyone knows that Neslihan will get every other set, there're still a considerable number of running sets. That's indication of deceptive and quick setting.
Fofao's performance at Final 4 was a lot below her normal performance and left a lot to be desired. Comparing Nilay to Fofao with a single came performance and claiming Nilay to be equal or better is ignorant and being illiterate of the game of volleyball. There was only one notable setting performance during the Final 4 and that was Naz Aydemir's setting in the last three sets of the Pesaro match.
Actually many people can't understand why Nilay doesn't start in six but in my opinion the reason that Guidetti prefers to play with Özge, Glinka and Nikolic likes to play with high and fast sets so Özge is an ideal setter for them there is not another reason but i really didn't count how many matches Nilay has bring to Vakıfbank GSTT this season did you? [Zarieche Odintsovo(H),Muszyna(H&A),Biala(A),Eczacıbaşı CL (A),Fenerbahce SF,and some victories against Fener and Eczacı in local league she had a big effect ) I can remember WCH Naz played an average game nothing more to say but it is clear that Naz played a horrible European league(She was the one of the reasons for defeat against Bulgaria) and Turkey lost.We didn't witness Nilay in NT yet therefore she will bring a great energy to NT no doubt.
) They both are complement each other. If Ozge don't have her perfect day, Nilay is they key and vice versa. Nilay maybe it's not the first setter in Vakifbank but she's an essential setter there ! Always ready to substitute Ozge and change the game. In my opinion they both are great. But now I'm writing about Nilay 
so.. she's not only fast and precise setter but as StarNight said, good server and digger and also good blocker. Naz's strong point is block, but Nilay can block too, and she do it very well. She's complete player, not only good at her postition but generally good as a player in all aspects.
Emlak TOKİ has a good potential imo. 
One of them was 3-0 but Eczacıbaşı was really bad at this match 