The similarties & differnces of the artwork by Hokusai The Waterfall at Ono and Edwin Church painting Niagara?

Answer 1

Both tried to capture the power and 'impressiveness' of a large waterfall.

The amount of realism. is a difference.
You could argue that Hokusai was bound by the style of his age and had to incorporate an allegory....but though it may not be apparent the same may be said about Church's work