https://www.cnet.com/news/microsoft-gives-entry-level-surface-book-2-a-processor-boost/

A model with the previous seventh-gen chip and only 128GB of storage, as opposed to the 256GB offered in all of the above machines, sells for $1,149 (£1,149 or AU$1,799).

We'll have to run the improved model through its paces to know for sure, but a jump from a dual-core seventh-gen to a quad-core eighth-gen processor should bring with it a solid improvement in power.