I've been using the sniper pistol, Lex, lately and enjoying it, but it's in the mid 20s and I've started thinking I'd like to try a different pistol when it maxes out. Lex is relatively low DPS but very ammo efficient, so I've been thinking I'd like to try something at the opposite extreme, one of the pistols that does amazing DPS but chews through ammo at a horrific rate. The two dual auto-pistols, Afuris and Twin Vipers, appear to share the crown in that area, and are actually pretty similar.
What are the advantages each has over the other? What situations or playstyles is each better for, if any? What implications do the differences between them have when selecting mods to put in them?