I read the Sword of Truth books first,not all of them yet.When i started the Wheel of Time the similarities had me checking the covers of the books as i read them to see what series i was actually reading
I did find that from book 5 or 6 Jordan would spend too much time with the Aes Sedai and not really progress the plot until the last 50 or so pages .
To quote a friend "When do these bloody women stop arguing in the book this time?"
Overall its difficult to say what series i have enjoyed most but i guess i'd better start both over again as its been years since i read some of them....thank god for the extra daylight this time of year