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They're ok on hard surfaces as I wear them most days 'cos they don't make my plantar fascithingy any worse. I've run about 130 mile in them on mixed terrain and some of that has been hard canal paths etc which they're fine for, but as an offroad shoe they're much better suited to mud n stuff.
Looking at the Nike you're after the Salomon Sonic may be closer match(?), although if you got the Speedcross as a stopgap you'd have them as offroad shoe option once you get the Nikes.
Yup, off @Stonehedge through here. They're v.good, my only small gripe is the laces gradually work loose. 9/10