there is nothing realistic about this website. probably even owned by Roger Ver!
it would have been actually great if it was a real "live BTC, BCH transaction visualizer".

in which case it would have shown 1.1-2.2 MB full blocks on bitcoin (1-2 lane of the highway)
versus
0.01-0.2 MB empty blocks on bitcoin cash (8 lane highway). https://cash.coin.dance/blocks#blockDetails

and if you think bitcoin cash is decentralized then you are more foolish than i thought. even the development is centralized. they proved this with the DAA fork.