Why do different exchanges (And reporting sites) have different BTC prices? In regular WSJ stocks, the price of Stock X is the same price no matter where you are seeing it (As long as it's up to date). Prices right this moment on BTC range from $5985 (Blockfolio) up to $6020 (Coinbase) depending on the exchange or reporting app/site.
A BTC range of USD 5985 vs USD 6020 is a price disparity of 0.58%. Depending on the liquidity of a stock you'll see similar price disparities on traditional markets as well. It's largely a matter of how effectively market participants can arbitrage between exchanges with a given title, no matter if its a stock or a crypto-currency.