These two websites are very similar, but have KEY differences. They both incorporate a Salary Cap which you have to stay under while picking your team of players. Remember that these websites set different Salary Caps and prices per player, just because there is good value on a player from one site does not mean that player will be good value on the other! If you are brand new to either of these websites I suggest you read this very carefully. I will not cover their payment & payout policys, all that information is on their respective website.
Here is a short “how it works guide” https://www.fanduel.com/how-it-works
Here is the official scoring, you must make sure to read over that if you are new. The most important note is that Fanduel is a HALF PPR aka you recieve 0.5 points for a reception. https://www.fanduel.com/rules
On Fanduel your team consists of a QB, 2 RB, 3 WR, TE, K, and D/ST.
Here is draftkings simple outline on how to play https://www.draftkings.com/help/how-to-play
This is the official scoring, you must make sure to read over this if you are new. Here on Draftkings the most important note is this is a PPR scoring system aka you receive 1.0 point for a reception. https://www.draftkings.com/help/nfl
On Draftkings your team consists of a QB, 2 RB, 3 WR, TE, FLEX, K, and D/ST.