It's challenging to assign numbers to quantities that aren't numeric in nature and everyone could pick different weights and methods but lets be realistic.

If you compare a Democrat from 40 years ago to one today you would see a 20% uptick in support for gay rights and a substantial uptick in the desire to spend tax money on healthcare, and a smaller uptick in support to raise taxes to support the former.

If you compare a republican from the same era you would find 10% of them now want a white supremacist christian ethnostate and 40% of them are supportive of the idea of killing their wrong thinking neighbors in order to live in Republican Town and even more would gladly part ways with the US of A if they could do it at the ballot box.

It may be challenging to assign weights to these dissimilar changes in positions but one of them is pretty clearly more extreme than the other.