I don't particularly like the way those look (either the knockoff brand or the real ones), but if those were my only two choices, I'd 100% go with the knockoff brand. No way in hell I'm paying anywhere near $700 for a pair of shoes.
Not that there's anything wrong with that. You spend your money how you want. But that's definitely not me. iirc, the most expensive pair of shoes I've ever owned came out to something like $90 (I went for some more durable ones because I worked in a restaurant kitchen at the time).