If we're talking about carbine buffer tubes vs standard pistol buffer tubes - yes, both use the same carbine buffers and springs. The carbine buffer is a particular size, vs a rifle buffer that is longer and must be used in a rifle buffer tube.
Within the carbine buffer size, you can get different weights. These buffers are aluminum bodies with moving weights inside, usually 3 steel weights for a standard weight (some aftermarket options use shot instead of solid weights). Weight can be changed by using different materials for the weights, generally steel vs tungsten.
