The Snail-Eater B is a major revamp of the iconic Iberian strike fighter. As per the standard naming scheme, such changes or major variants are designated with sucessive letters, or letters picked by the submitting development collective in question where they are intended to reflect the aircraft's intended adaptations.

In this case, the changes practically make the airframe unrecognizable: while the faired radial engine is maintained, the pilot nacelle has been revamped and the fuselage has been replaced with a newer one, both more aerodynamic and easier to build, and finally the port wing has been fitted with a winglet to reduce drag. These changes have massively improved the Snail-Eater's performance well and beyond what the older A variant's speed, to the point that it is comparable to a fighter's at lower altitudes. Moreover, the replacement of the tail fins with swept-back stabilizers based on the Aquilone's canards has improved the type's maneouverability.

It's armament is similar to that of the A version, but has notable replaced the RCMGs with dual 18 mm cannons in the inner starboard wing.