Calling it a 'rip-off' is rather harsh and inaccurate. High speed trains have been around for many decades now and the technologies involved designing them have matured now to the point that the basic elements of most new designs remain the same. The basic design principles remain the same, but many specifics change. This is not really 'copying' a design.

Pretty much all cars and mobiles have the same basic design principles and look and function similarly at a first glance. But the details vary wildly. It's not that they are...
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all copies of other products. Rather, some design principles are so basic that they stay common in most regular designs.

As for the Bogie design, as has been pointed out in the blog by Mr.Mani, IR had already tried 'modifying' the existing LHB bogies for mounting Traction motors. However, these attempts did not work out.

While the new bogie has some design principles in common with the FIAT bogies in the LHB coaches (like the easily noticeable Y-shape frame) and the vertical dampers attached to the bogie, it is not a modification, rather a basic starting point. The Y-frame of the FIAT bogies has worked out well for high speed runs with LHB coaches and was a good starting point.

But pretty much the entire traction motor mounting system had to be designed from scratch. The LHB bogies were designed for axle-mounted disc brakes and as such had a very different design. This would make it unsuitable for mounting traction motors, so the bogie had to be completely redesigned to accommodate this.

So, it's not a ripoff or a copy. It does borrow some elements from the FIAT bogies, but it is far from being just a modification.