The Helix can play backing tracks through any of its various inputs, including USB. With an inexpensive gadget (https://www.google.com/search?q=bluetooth+audio+adapter&ie=UTF-8&oe=UTF-8&hl=en&client=safari) you can play tracks from your phone.
I think you'll only need one or the other. Since you say your guitar skills are still developing, I'd say the Firehawk probably does all you need right now. By the time you've worn out the Firehawk there will be another, even more amazing, generation of gear.