I have them both on PC and PS4, and I love them both (on PC).
I'll start with: Dead by Daylight has a lot more content overall available and the levels are procedurally generated so it's always mixed up which adds to replay value. Dead by Daylight is also simpler overall in that, as a survivor, your job is to fix 5 generators and escape. As a killer, you hunt the survivors, knock them down then sacrifice them on big spooky hooks. There's a lot of tension in releasing other survivors, hiding and getting away from the killer. And you will get away if you play your cards right. As a killer, it's a lot of fun getting the drop on people or using your special powers. However if there's one thing I don't like about DbD (and this is purely from my own experience) it's that there is no skill based matchmaking. When I first got the PC version after playing on PS4 for hours and hours, I jumped into a game as a killer, naked as the day I was born (so to speak, had no extra abilities) and was matched with survivors who were all high rank and had epic-level rare items to use. One guy was able to completely repair a generator in what seemed like 5 seconds. Needless to say, I didn't stand a chance that game and lost. It wasn't a level playing field, even though Killer/Survivor balance is what Dead by Daylight strives for.
Friday the 13th... Again, got on PS4 first, then jumped to PC. I'll say this first: if you're playing on a console, the general player base is the game's biggest problem. And if you're thinking about getting it on Xbox... don't. Now, between the two, I think I like Friday the 13th better. When you start F13, you're obviously a counselor or Jason. And if you've ever seen a Friday the 13th movie, JASON IS OVERPOWERED. He is supposed to be. people seem to lose sight of that fact and whine and complain when he grabs someone and kills them near-instantly. It's what Mr. Voorhees does. Other than Jason being OP by design, the game itself generally is a little more balanced from the beginning. All the counselors can get perks that do things like make them harder for Jason to sense, or start them with First Aid spray or something (if the perk works and doesn't glitch out.) There are three levels in F13, and each has similar goals of which you can do one, or multiple: Phone police, call Tommy, fix car/boat and escape. So theres a few things you can do but 99.9% of the time, they will require communication and teamwork even with strangers. Teamwork is even MORE important if you go for the "secret" goal: Kill Jason. I'll let you learn how to do that on your own.
With F13, you have to search cabins for weapons, parts, first aid, things to slow Jason down, etc. They're randomly placed, and that's both a blessing and a curse. I've had games where I found literally nothing except a tree branch as a weapon, and others where the game started me near a boat, with a cabin close by that had gas and a boat propeller in it. I fixed that boat and got away in less that 2 minutes.
As for communication, DbD does not need communication but F13 DOES. There's nothing worse than the guy who doesn't speak being killed in the middle of nowhere with the car keys or phone box fuse in his pockets. Having said that, on the PC at least, the vast majority of my games have been very good and socially pleasant in F13. I can't say the same about the PS4 version, but it is what it is.
Friday the 13th does have a mess of glitches and the devs are working on that. But you will likely run into some problems, some that may break the game so you can't win, like cars being tossed into trees, or Jason being thrown into the sky.
Overall, I'd give my vote to Friday the 13th on PC, mostly because I love the franchise and it not only has a bit more style, but also has a bunch of F13 movie alumni who worked on it.
On console, Dead by Daylight for sure. It is fun, easy to jump in and out of, and brings the right kind of tension.
But I love them both, so it's literally difference of like, 5 for F13 and 4.9 for DbD. They're both worth it really. Sorry this went on longer than I intended...