Since both are owned by Disney. With the purchase of Fox they were able to bring legitimate adult content to give them a full portfolio. The FX catalog is very good. The Marvel/star wars plans for 10 original shows will be bigger than anything else from any other streaming company.
Imo the main players in 5 years will be Netflix, Disney, and HBO max. Amazon will still be around but I put it in it’s own category because people only use it because it comes with prime. If it were standalone it would fail.