Yes, the 2175 denotes their "Professional" series.

Just the 2175 is more of an arts and craft set of cutters, designed more for cutting floral wire and such

2175B is designed for cutting railroad track,

2175ET is the Sprue Cutters, sometimes called Long Nosed Sprue Cutters

2175SH is the same as the plain 2175, just has shorter handles.