Is there a difference? Are those modern editions of amiga os more capable than the original, or as capable as any popular os?
Is this a trick question? The answer is a bit complicated:
Amiga OS had a low overhead architecture and both MorphOS and AmigaOS4 are trying to keep this intact ... with varying degrees of success.
There is great software that hasn't been adequately replaced on other platforms and can only be run in emulation or the real Amiga.
Old Amigas can not easily produce or consume data formats that are common on current implementations of Linux, Mac OS, IOs and Windows, except when it is plain text. NG Amigas are far better in that respect. NG Amiga Hardware is dreadfully slow, even the X1000 is no match for a modern PC. G4 Macs perform worse than iPads.
So Amigas and NG Amigas are
less capable than current PCs but very different in software. The original Amiga HW has a
superior design compared to the NG Amigas, but suffer from their slow clock speeds and cacheless architecture.
The Amiga line of computers has ended and so will the NG Amiga line in about ten years. If you want to open a new line of computers and give the name Amiga to them - fine, but don`t fool yourself: branding something "Amiga" doesn't change the value of the product by one iota. So if you are selling vanilla PCs you have to face it: they are just PCs nothing more.
The honest way of selling them would be calling them "Amiga PC i7" or "ARM Amiga Windows Tablet", but I guess "Commodore PC i7" is the better name.