preamp inputs labels

Some preamps have labels such as, "tuner," "phono," "CD."
But others such as Aesthetix have labels like "1", "2", "3", "4". Are dedicated inputs different from non-dedicated?
No All line level/stage inputs are the same. Phono inputs of course would most likely be routed to an RIAA phono stage prior to going to the line stage.
Agree with Swampwalker except a few pre-amps have an imput which is designed to alter the digital signal and should not be used for a different component. These pre-amps are rare - but I believe Bob Carvers had one, and perhaps there are a few others.