Open source vs not open source. Cockroach still in it's infancy vs spanner. I'm sure there are a variety of things here, but they mostly aim to solve a similar

Open source vs not open source. Cockroach still in it's infancy vs spanner. I'm sure there are a variety of things here, but they mostly aim to solve a similar problem with a slightly different approach. Some of the big details relate to not requiring atomic clocks: https://www.cockroachlabs.com/blog/living-without-atomic-clocks/ https://www.cockroachlabs.com/blog/living-without-atomic-clo... Here's their comparison chart, though naturally it's biased for things-cockroach-does: https://www.cockroachlabs.com/docs/cockroachdb-in-comparison.html https://www.cockroachlabs.com/docs/cockroachdb-in-comparison... (I guess you can't write to Spanner with SQL? That seems like a big difference. No INSERT/UPDATE?)