That's correct the reward ratio is higher than batch 2 and in addition to 2$PDEX for a DOT, they are also giving out some utility-based NFTs for the top Crowdloan contributors.
I tjink that NFT rewards for top 1K contributors. I was trying to figure out how NFT would work and according to my answer these NFTs will give a twenty to fifty percent discount on the fees charged when using the Orderbook