gorpc VS tendermint

I don't have any experience with goRPC (I'm assuming you're referring to https://github.com/valyala/gorpc), but just to note that that repo hasn't been updated in 7 years and has open issues that are that old, too. https://github.com/grpc/grpc-go has 17.5k stars and is actively maintained. That doesn't say anything about their relative performance - goRPC might be faster - but you probably won't have a fun time if you run into issues.

Tendermint Core / CometBFT — a state machine replication engine (written in Go);

There are good use-cases, but to much focus on cryptocurrencies. Frameworks are not well designed to be used in other use-cases. Best that I have found that doesn't forces you to a specific architecture is Tendermint, but is not even close to state-of-the-art performance and scalability. Everything else is designed around cryptocurrency and smart contracts.

BFT is an algorithm that ensures that the whole network works well even if a few members are acting fraudulently. As long as these fraudulent members are less than 33% of those who have voting power, the network will work fine. Those with voting power are those with something at stake. Cosmos uses a type of BFT consensus engine known as Tendermint. Cosmos uses Tendermint because it provides the best support for building POS blockchains.

Relevant Github ticket showing chains are now scrambling to decide which fork to use: https://github.com/tendermint/tendermint/issues/9972

BlockX is based on Tendermint Core, which relies on a set of validators that are responsible for committing new blocks in the blockchain. These validators participate in the consensus protocol by broadcasting votes which contain cryptographic signatures signed by each validator's private key.

Built with Cosmos and Tendermint.

Haqq is a scalable, high-throughput Proof-of-Stake blockchain that is fully compatible and interoperable with Ethereum. It's built using the Cosmos SDK which runs on top of Tendermint Core consensus engine.Haqq allows for running vanilla Ethereum as a Cosmos application-specific blockchain. This allows developers to have all the desired features of Ethereum, while at the same time, benefit from Tendermint’s PoS implementation. Also, because it is built on top of the Cosmos SDK, it will be able to exchange value with the rest of the Cosmos Ecosystem through the Inter Blockchain Communication Protocol (IBC)Features

Tendermint