So let me start with, neither is better than the other, they both have their flaws. Warframe - It's a grinding simulator that takes space & ninjas, then throws they into an epic journey of constant battle till last person standing. As grindy it may be, it also has the *of course* "Pay to get stuff faster" side, where you can just pay to get whatever you want. Destiny - Still a grinding simulator, but instead of space ninjas, it is "guardians" that protect the final safe haven on Earth from the "darkness". As it has nothing like Warframe that you "buy to get things faster", it does have constant DLC that come out, and lock you from certain things. Conclusion - Both are wonderful games, but if you hate grinding for hours, play neither of them. If you're fine with grinding, give both of them a shot. You'll either play both of them, none of them, or one of them. (Also, DE has always updated the game really fast, so it's gets new content a lot. But, at the same time, when Destiny gets it's new content, it is a lot.)