The pricing has changed recently, grandfathered in organisations have reasonable pricing (relative to GitHub) but the pricing for new organisations is much more expensive than GitHub. You can compare GitLab on features, but if you want to use those features the pricing is not comparable (GitLab's $100/user/m vs. GitHub's $21/user/m).
GitLab ultimate is a Jira competitor, not a GitHub competitor.
GitLab Premium is ($19/month + runners + [optional] self hosting) vs ($21/month + possibly leaking your code/secrets in copilot).
And, in my opinion, GitLab CI has a much better feature set and integration than GitHub's. You have so much opportunity to optimize the performance of your runners just off the bat. It's quite amazing especially for people with larger repos (ex: monorepo companies).
https://about.gitlab.com/blog/2021/01/26/new-gitlab-product-...