this chart can be useful to have an idea of the degree of
"decentralization" of the two networks.
From the two network, one is a decentralized network and the other is not, so what order of decentralization are we to measure in here, also as you have been told that bitcoin uses PoW while the other coin uses PoS, this alone cannot bring about their comparison or degree of decentralization wince they are both not on the same page being decentralized, it would have been better if the two were decentralized and the degree to which they appear being decentralized bith is taken into account.