There are many new exchanges available today that could replace UNISWAP like TOMOCHAIN's tomodex, KOMODO's atomic swap, Solana's SERUM DEX, and a few more coming in the future. They provide good service and have quite a high volume of transactions and are of particular interest to the community.
Stakenet may be a new project with a great idea but it needs a specific product with strong community interest. So far I have just learned about this project. This will hardly guarantee their success.
They are on-chain DEX's, which means high trading fees, and slow trading.
Doesn't compare the slightest to Stakenet
What does "on-chain" DEX's mean? I've seen these discussions for a while, and don't understand the logic behind on-chain and off-chain. Is it something related to The Lightning Network? A bit confused here.

I just made an inquiry for you. And got a little more explanation about your question here:
Onchain DEXs: eg Komodo DEX, uniswap, block dex etc: atomic swaps that happen onchain. So they are limited to blocktime (btc blocktime: 10 minutes), every swap has to be confirmed by every miner, so you have to pay a normal transaction fee to the miners (rember Uniswap fees in july which were like 50-100 USD swap), is not very private as you can see every adress in every explorer and not scalable
Offchain DEX: eg Stakenet Dex, they are using Lightning Network and Connext. These are layer 2 solutions, so it is network built on Blockchains (layer 1 == massive security by mining power), a network between nodes. So no miners are involved here, it is offchain=> more privacy as every tx is only stored in your node, never gets broadcasted to the public explorer. Less fees as you dont have to pay the miners, more scalable (eventually up to 1 Mio TX / second) and faster (~ instant) as you dont depend on block limit or blocktime.
I hope I have helped you further with this.
You can always test the dex yourself or wait for the SSUI of the mclw to be live for everyone. More info can be found in our discord.
Thanks a lot for the explanation man. Helped a lot. Might do some extra research into this project. Looks promising!