No, it does refer to the same type of voice. Capable at the same time of having a very strong low register, and also the higher notes in the soprano repertory, along with coloratura. Of course, there is a price to pay (unless some day we can get an exceptional gift from Nature), as lack of homogeinity in the singing, that going to the extreme it can sounds like two voices, in just one body.
Reading about Pasta, and listening to Callas, we can see that there were a lot of similarities between the two.