Bandersnatch
The Bandersnatch (バンダースナッチ, bandāsunatchi?) was a Tyrant - B.O.W. model type developed by the Umbrella Corporation in 1998. The name originates from Lewis Carroll's poems The Hunting of the Snark and Jabberwocky, which give no description of the creature. The Bandersnatch was developed as an...
residentevil.fandom.com
The Bandersnatch was developed as an offshoot of the Tyrant project, intended for reasons of practicality.The reason for this was simple - those with the necessary genes to be turned into Tyrants were small in number, and the Tyrants themselves were expensive to develop. In short, the Bandersnatch was a 'cost-effective' alternative proposal.
So basically if couldn't afford the real deal, you could've settled for a misshapen, atrophied version that might or might not have killed you once deployed.