I think you will run into trouble with a conventional splitter. What they do is to take an input signal and send exactly the same signal to both outputs.
That’s fine, so long as both the devices you’re connecting to are capable of handling all possible audio and video formats you might want to use. But in this case they probably can’t: the television probably can’t handle DTS-HD or Dolby True HD audio, while your pseudo-AVR may or may not be able to handle 4K HDR video on its input.
If either device can’t support something, what usually happens is that the splitter sends a message back to the source telling it not to send that kind of signal, and the source sends something less demanding instead.
With a Vero 4K you can probably force it to send the desired audio and video format regardless, but then there’s a risk that either the TV or the AVR simply won’t be able to lock on to the signal at all, and you’ll get no output.
To summarise: use a standard splitter if you want to send exactly the same signal to both outputs: if you want to send video to one output and audio to another, a standard splitter won’t do that: that’s what the HDFury and Egreat devices are designed to do.
If you insist on buying a conventional splitter anyway, make sure that the specifications explicitly say that it supports 18gbps (or 600MHz), and that it’s HDMI 2.0a or 2.0b, not just HDMI 2.0.
As for which to buy out of the Egreat and HDFury devices, I suggest you buy the cheaper one, and return it for a refund if it doesn’t work.