I have no idea, but at that price, get the instyler (you can get from Goodguys for $114 or the website for a bit less). It's a curler and straightener in one. Their reviews might be faked too, for all I know, but my niece, my daughter and I all have one. I have super thick super frizzy hair which no straightener has worked on with less than an hour and halfs work, and this takes less than 10 mins to completely straighten it. Another 5 if I want to add some smooth curls.
My niece prefers it to her GHD!