# L2 Rollup Comparison

**URL:** https://forum.arbitrum.foundation/t/l2-rollup-comparison/29847
**Category:** Technical Discussion
**Created:** [August 20, 2025, 1:42pm UTC](https://forum.arbitrum.foundation/t/l2-rollup-comparison/29847 "2025-08-20T13:42:03Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![notrithik](https://avatars.discourse-cdn.com/v4/letter/n/35a633/32.png) [@notrithik](https://forum.arbitrum.foundation/u/notrithik)
#### Post date: [August 20, 2025, 1:42pm UTC](https://forum.arbitrum.foundation/t/l2-rollup-comparison/29847/1 "2025-08-20T13:42:03Z")

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Hi! I’ve written a blog post comparing L2 rollups’ architectural differences here: [A Deep Dive into L2 Architecture: Arbitrum’s Interactive Proofs vs. Optimism’s L1 Re-Execution](https://notrithik.substack.com/p/a-deep-dive-into-l2-architecture) . The original was written a few years ago and has been updated since then. I’m new here and I’d love to gather feedback from you guys - whether it be about the writing style (I’ve made some use of AI, but if it comes across as inauthentic, let me know. I’m a very technical person and I’d love to grow as a writer), technical details in the blog, or anything else that caught your eye.