Yes! I've thought that since IV came out!
The Bifta is a BF Injection and the Injection is a Big Bug. It bothers me.
Yeah I thought it was strange how R* did not switch the names of the Bifta and Injection.
I've also noticed that the Camper from SA (Truth's vehicle) was replaced by an RV in V, which, oddly enough, looks like SA's Journey. The camper model from SA is used for the BF Surfer in V. Meanwhile, the Journey has been given a totally new look and now looks like a rusted-out Winnebago from Breaking Bad
Now, I've always thought that the Camper's and Journey's names should've been switched around in SA (the name "Camper" makes more sense for an RV than a hippie bus). R* seemed to have realized that during the production of GTA V and named the big RV "Camper", but at this point, I'd rather have consistency over correctness because SA's vehicle names are already set in stone.
Pics for reference in case my rambling was too confusing lol:
Camper (GTA SA):
Camper (GTA V):
Surfer (GTA V):
Journey (GTA SA):
Journey (GTA V):