Biden may be similar to a qualified experienced Republican, but the Parties have evolved. There are very few qualified experienced Republicans left in the Trump Party. So you are comparing the Democratic Party to the Republican Party of many years ago.

Compared to the Trump Insane Clown Posse, Biden is a saint.

As for "no difference between the Parties", that is simply a lie. You can search the internet and find all sorts of analyses of the records as to crimes committed by different administrations. Here is a pretty good one:

Crimes By Party

Republican administrations have vastly more corruption than Democratic administrations. We provide new research on the numbers to make the case.

We compared 28 years each of Democratic and Republican administrations, 1961-2016, five Presidents from each party. During that period Republicans scored eighteen times more individuals and entities indicted, thirty-eight times more convictions, and thirty-nine times more individuals who had prison time.

(This does not include Trump's administration.)