In reply to Hamish.

Here's a quick comparison of the .woff asset load for Libre Baskerville as loaded on the comparison pages linked in this article:

Brick: 302.9kb
Google: 91.4kb

My system didn't have to download the EB Garamond, but others might, which would add:

Brick: 217kb
Google: 27.7kb

For a grand total of:

Brick: 519.9kb
Google: 119.1kb