It gets even more confusing trying to keep the films separate in your head when you see the cast - both films of which are impressive and have lots of "Names". (Hm - I probably haven't made it easier using Disney images alongside the characters but hopefully you get the idea - these guys = NOT Disney.)
For this one we have the following line-up:
The film includes Benedict Cumberbatch as Shere Khan, Cate Blanchett as Kaa, Christian Bale as Bagheera, Naomie Harris as Nishi, Eddie Marsan as Vihaan, Peter Mullan as Akela, Tom Hollander as Tabaque, Jack Raynor as Mowgli's brother and Rohan Chand as Mowgli. Serkis, (Edit: who is directing) meanwhile, will (also) be the voice behind Baloo. (source)
Disney's is even more star-studded with:
..Ben Kingsley as Bagheera, Idris Elba as Shere Khan, Bill Murray as Baloo, Giancarlo Esposito as Akela, Lupita Nyong'O as Raksha, Scarlett Johansson as Kaa, and newcomer Neel Sethi as Mowgli.Disney's The Jungle Book is due in theaters April 15, 2016 while Serkis' movie is scheduled for release on Oct. 6, 2017.
Perhaps the two movies really will be as radically different as the two Snow White movies were that were released at (pretty much) the same time. With over a year's difference in release time, I guess we'll see how it pans out.