nav and content changes

Author: mitchpolygon

docs/cdk/releases/pp-intro-components.md docs/cdk/concepts/pp-intro-components.mddocs/cdk/releases/pp-intro-components.md renamed to docs/cdk/concepts/pp-intro-components.md

@@ -59,6 +59,26 @@ Below is a breakdown of the technical differences between a zkEVM rollup and val
 | **Final settlement**  | Transaction batches and their corresponding proofs are added to the Ethereum state.                                                                                                                      | The hash of transaction data and its proof are added to the Ethereum state, referred to as the consolidated state.                                                                                                                                         |
 <sub><sup>\*</sup>JSON RPC, Tx pool manager, Sequencer, Etherman, Synchronizer, State DB, Aggregator, Prover</sub>
 
+
+Polygon CDK running in validium mode inherits the core functionalities of a zkEVM rollup node and adds a [data availability layer](../glossary/index.md#data-availability-committee-dac).
+
+## Key differences
+
+|        | Rollup                                                    | Validium                                                                           |
+| ------------------------ | ----------------------------------------------------------- | ---------------------------------------------------------------------------------- |
+| **Node type**            | [cdk-erigon:v1.2.24](https://github.com/0xPolygonHermez/cdk-erigon/releases/tag/v1.2.24) | [cdk-erigon:v2.1.x](https://github.com/0xPolygonHermez/cdk-erigon/releases)                  |
+| **Data availability**    | On-chain via L1                                            | Off-chain via a local option, or a [DAC](../glossary/index.md#data-availability-committee-dac) + [DA node](https://github.com/0xPolygon/cdk-data-availability) |
+| **Components**           | zkEVM components\*                                        | zkEVM components\* + PostgreSQL database + on-chain committees                   |
+| **Contracts** | [zkEVM smart contracts](https://github.com/0xPolygonHermez/zkevm-contracts)  <ul><li>`PolygonZkEVM` (main rollup contract)</li> <li> `PolygonZkEVMBridge`</li> <li>`PolygonZkEVMGlobalExitRoot`</li></ul>  | [Validium-specific DAC contract](https://github.com/0xPolygon/cdk-validium-contracts) <ul><li>`CDKDataCommittee.sol`</li><li> `CDKValidium.sol` </li></ul> |
+| **Infrastructure** | Standard infrastructure                                     | Dedicated infrastructure for data availability layer and DACs                      |
+| **Tx flow** | All transaction data is published on L1 | Validium only publishes the hash of the transaction data to L1. The sequencer sends both the hash and the transaction data to the DAC for verification. Once approved, the hash+signatures are sent to the Consensus L1 contract of the validium protocol.
+| **Security** | High security due to on-chain data availability and zero-knowledge proofs. |Off-chain data availability can affect security if the sequencer goes offline or if DAC members collude to withhold state data. |
+| **Gas fees** | High, because all transaction data is stored on Ethereum. | Low, because only the hash of the transaction data is stored on Ethereum. |
+| **Proof generation** | Uses Prover to generate proofs of batched transactions for validation. | Uses Prover to generate proofs of batched transactions for validation. |
+| **Final settlement** | Transaction batches and their corresponding proofs are added to the Ethereum state. | The hash of transaction data and its proof are added to the Ethereum state, referred to as the consolidated state. |
+
+<sub><sup>*</sup>JSON RPC, Pool DB, Sequencer, Etherman, Synchronizer, State DB, Aggregator, Prover</sub>
+
 ## Further reading
 
 - [Ethereum documentation: rollups](https://ethereum.org/en/developers/docs/scaling/#rollups)

docs/cdk/concepts/rollup-vs-validium.md

@@ -61,10 +61,9 @@ nav:
       - Overview: cdk/overview.md
       - Releases:
           - Current Release:
-              - Polygon CDK Fork ID 12: docs/cdk/releases/fork-id-12.md
+              - Polygon CDK Fork ID 12: cdk/releases/fork-id-12.md
           - Previous Releases:
               - Polygon CDK Erigon: cdk/getting-started/cdk-erigon/releases.md
-              - Polygon CDK Fork ID 7 to 9: cdk/how-to/migrate/forkid-7-to-9.md
       - Get Started:
           - Local Deployment Guide: cdk/getting-started/local-deployment.md
           - CLI Tool: cdk/getting-started/cli-tool.md
@@ -77,8 +76,9 @@ nav:
               - Resources: cdk/getting-started/cdk-erigon/resources.md
       - How To:
           - Migrate:
+              - General Guide for Projects: cdk/how-to/migrate/fork.md
               - Fork ID 9 to 12: cdk/how-to/migrate/forkid-9-12.md
-              - General Guide for Partners: cdk/how-to/migrate/fork.md
+              - Fork ID 7 to 9: cdk/how-to/migrate/forkid-7-to-9.md
           - Create Custom Native Token: cdk/how-to/use-native-token.md
           - Integrate DA Layer: cdk/how-to/integrate-da.md
           - Manage Allowlists with Policies: cdk/how-to/manage-policies.md
@@ -103,8 +103,6 @@ nav:
           - CDK Rollup: cdk/architecture/cdk-zkevm.md
           - CDK Validium: cdk/architecture/cdk-validium.md
           - Staking the Bridge (STB): cdk/architecture/staking-the-bridge.md
-      - Specification:
-          - Validium vs Rollup: cdk/spec/validium-vs-rollup.md
       - Glossary:
           - Glossary: cdk/glossary/index.md
       - Additional Resources: