Miners are all unique, but some are really unique.
Miner NFT's Are All Unique
All Miners are rare, as there will only ever be 10,000, and all Miners have the ability to mine Gold at the same rate.
The more your Miner invests in Credits over time, the more relative Gold they will mine, regardless of rarity. Don't want to invest Credits into your Miner? That's more than fine, he'll still mine Gold when he's staking his claim at MinerJoe.com.
As with any collectible NFT series, some Traits & Rarities will always fetch a higher premium on the open market. This is the foremost purpose for holding a Mythic over a Common Miner, for example.
Full Rarity Metrics & Rankings are LIVE on MinerJoe.com - simply view each Miner via the Market.