No, they're not.
A clone is when a layout is pretty much a straight copy...For example Buzzsaw, Arkham, Storm Coaster, Roadrunner, Bug Run.
Using similar elements is not the definition of a clone, because obviously every manufacturer has their house style and a certain way of designing each element that works for them.
Trying to say using similar elements constitutes cloning is like saying the different sizedd models on offer by a car manufacturer are clones because they often share a family face and design cues, and share parts, engines etc.
And B&M hypers most certainly don't all have the same turnaround element, nor are all of them even out and back!
Nothing built so far matches Lewas Flash, not even the direction the turnaround is taken in, therefore not a clone.