I personally prefer the fame sets over the crafted ones b/c my builds prioritize agi over int. Agi is great, since it's cast speed, evasion, and parry. Int, to my build, is considered low priority, since int gives only a tiny amount of matk (1 int = 5 matk + multipliers). Some mages priortize int and their own build and get cast speed other places, and it can work for them. But those mages will tend to have lower base cast speed and lower base evasion than mages with fame sets. The matk difference will vary based on the mage, but btwn each builds I have yet to see a difference of more than 5k base or so (assuming neither mage is using 4 green certs; that changes things a bit, hence why it varies based on the mage).
Note: I'm talking about end-game (lvl 65+) builds here. Tl;dr: I'm not saying that the crafted sets are bad, just in that my personal opinion, fame sets are better.
Off topic note: kep where did you find your profile picture? O.O It's so pretty and I want one XD