Looking at the specs, it's not really an upgrade from the H2H, in terms of performance at least.
It uses the same cpu as the H5, which itself is just a minor revision of the cpu in the H2H capable of supporting 4K output (not necessarily via the tuners, just apps). There isn't a speed difference, it literally added 4K support and that's it.
It's main purpose I'd say is the introduction of a twin cable tuner + a single sat tuner. So for those looking for a twin cable tuner it looks like a cheap solution.
For those looking for a performance boost then you'll be disappointed.