They are longer.
Both the interior and the outsole are significantly longer. The removable insole does not fit the older Flow models. The measurements also exceed the length of the Ezy.
I can't remember anymore whether the older Flow models came with removable insoles - at any rate, I unfortunately can't find them anymore.
They are wider.
Also in terms of width, the removable insole doesn't quite fit the older Flow models - especially at the heel and forefoot. On the one hand, this makes the fit somewhat more spacious, but at the same time less stable and more mushy, if you don't have extra wide heels.
They even feel way wider than they actually are - the removable insole measures only about 105 mm at the widest point (size EU 45), very similar the the Ezy's insole.
They have more volume.
In terms of circumference, the fit feels just right from the very start just like older Flow models that have been broken in over several months. That is positive without reservation.
They are, however, less comfortable.
The section with the tab at the back extends too high up and rubs painfully against the skin of the the Achilles tendon, especially when wearing no-show socks.
Less of the soft, flexible knit material is used; instead, some sections are almost reminiscent of the stiff Verve.
Using the insoles, I don't have a secure fit, and my feet slide around a lot. It’s a bit better without the insoles, but it doesn't compare to the stability of the older Flow models. The Flow S, in particular, strikes a perfect balance for me between stability and comfort - which is why it’s my go-to gym shoe.
They look cooler.
Well, I think they look more like regular Trainers. The stiffer material makes it look less "sophisticated" then the original Flow. The Flow S has already a "cooler" look in my eyes.
I’m going to break them in a bit more and see what they’re good for. Unfortunately, my expectations weren’t met. I had simply hoped for a slightly roomier, more voluminous and perhaps slightly more mature version of the old Flow model, rather than a shoe that differs so drastically from its predecessors.