Ok, I must confess, i just bought a Helix.
I's a huge step up from 11R in terms of flexibility, usability and possibility to create very experimental sounds.
But is a huge step up soundwise?
The internal cabs of the Helix are better than the ones in the 11R, but what if we use the same IR for both Helix and 11R?
I made two very short samples: same DI (heavy riff with a 7 string Ibanez), same IR (Hesu 2x12 with an I5 as mic), different amps (Archon for Helix and Modern Recto for 11R) to see if they are equally good (I didn't try to tone match).
Here are the samples:
1. 11R
https://www.dropbox.com/s/coblu882wzmblsl/recto%20IR%20less%20gain.mp3?dl=0
2. Helix
https://www.dropbox.com/s/0xbrkurrkgfvqzj/Helix%20Archon.mp3?dl=0

What do you think?