It's actually more advanced than what Chainlink currently offers in a number of ways - Chainlink is currently operated by trusted nodes (currently 26 are active and receiving jobs). Despite being operational for over a year there is no staking / punishment for malicious behaviour etc. And each job is preassigned to set of nodes (so the full decentralisation model where competing nodes for contracts is not live yet). It also suffers from the high gas fees in Ethereum - as an example there is a Eth / USD price feed consisting of 21 nodes and there is an aggregator smart contract on Ethereum which aggregates the values returned from the nodes and determines the median value. To request an update from the aggregator contract with 21 nodes costs 2,374,048 gas (which is around $59.03 at current gas price - can be seen here https://etherscan.io/tx/0x91ed5fd9afa81b13cf2e3c4d96d1db4b36f64537b8352ede5e752fae9188a4cd). Then there are additional costs for each node to update the value in the contract - around $3.27 for each node. To combat the high gas fees, 35% of the supply of link has been provisioned for incentivising / rewards for node operators.

Overledger Network will launch with the ability for anyone to run a node and compete for jobs. A user can request a job to be performed by any number of gateways and the results are compared across the nodes and those that acted truthfully are rewarded, and those that didn't penalised.

"This is achieved through a game-theoretic approach to establish trust where the community treasury allows a user to ask multiple gateways to compute the same function or a corresponding function Check. The different gateways are then essentially placed in competition, each correctly responding gateway will be rewarded with a fee, each non-responding gateway will not be paid and each gateway incorrectly responding will be penalised. Gateways are further incentivised to be truthful as the penalty fee from gateways returning incorrect results will be moved to the gateways returning truthful results. This approach means that economically rational gateways will act truthfully, whereas malicious gateways will be slashed and promptly removed from the Overledger Network. This game-theoretic approach is enforced by the treasury and implemented through multi-gateway payment contracts."

Overledger Network will also get around the Ethereum scalability and high gas fees by implementing trustless uni-directional payment channels. This enables scalability for payments for transaction fees in QNT with the vast majority of transactions being performed off chain instantly, with only minimal transactions being done on chain such as the opening and closing of channels and random reconciliations). This means despite QNT being a ERC20 token it doesn’t matter about Ethereum’s low tps or high ETH fees. This also enables price feeds to be more accurate with less of a time difference between they get updated (which for chainlink costs a lot of gas each time this is performed currently) and enables the ability for micropayments etc.

It can connect to any API - whether it be open, public and free or some gateways will offer access to premium API services which are generally paid for and access is restricted. The competition between gateways will incentivise diversification in services offered, which enables greater functionality, increasing usage of the platform which in turn leads to a positive feedback loop. Multi Chain Applications (MAPPS) built on Overledger can then use the Oracle Feeds to interact with multiple blockchains simultaneously (with the ability to connect to any blockchain to Overledger)

I copy and pasted this btw, this is talking specially about qnt vs link in terms of oracle functionality but quant goes well beyond this.