Not x-actly the same but i used to own the Tanaka G17, i'm a huge fan of the rs Glock's, definitely my kind of working tools!
So i got the Tanakar G17 and i was very disappointed in how it felt, it felt really brittle and i ended up selling it pretty quick 'cuz it felt as i would wreck it if i tried to fire it...
The G18C is very, very tempting as i love me Beretta M93R.. who would not love a machine pistol
I will probably end up buying one anyway....