Spurred by
this discussion, I decided to review the karma spent on attributes, active skills, active skills groups, and knowledge skills of all grunt type NPCs from the core rulebook and the Plots & Paydata book from the Alphaware kit.
I've attached my findings to this post (PDFs of an Excel spreadsheet) as the data is somewhat elaborate. I essentially just noted down how many attributes, skills, and skill groups each NPC had listed on their entry and multiplied by the appropriate Karma cost to get an approximate karma spend per NPC. Note that certain factors were not considered, such as Magic and Resonance attributes (some NPCs seem to be missing these), karma spent on resources (deckers and street sams in particular) and any qualities or similar. Also note that each tier also includes Lieutenants, who in many ways have far more potential than their comrades.
What follows, then, is a baseline comparison of karma costs for each Professional Rating entry, with regards to attributes, active skills, active skill groups, and knowledge skills only. Without further ado, I give you a summary:
PR0: Ranges from 218 to 340 karma, most of it spent on attributes.
PR1: Ranges from 250 to 445 karma, with two thirds or more spent on attributes.
PR2: Ranges from 186 to 467 karma, with spend all over the map. This is by far the most confusing range, as the Rent-A-Cop has extremely low dice pools and only 186 karma spent even though it's supposed to be a PR2 opponent.
PR3: Ranges from 266 to 568 karma, with two thirds or more spent on attributes. Interestingly, the grunts in P&P are more diverse than their core book counterparts, with knowledge skills listed as well as slightly different statlines.
PR4: Ranges from 230 to 671 karma, with two thirds spent on attributes. Same as PR2, with one entry (Mafia from P&P) having significantly lower attributes and skills than every other entry
PR5: Ranges from 658 to 1318 karma, with an approximate half spent on attributes. This tier represents the most dramatic shift in ability, as the PR5 Elite Corporate Security Lieutenant has a whopping 1318 karma spent on the categories mentioned alone, before accounting for gear costs and the like. Karma spent on skills at this tier is more than half of the entire allotment.
PR6: Ranges from 1278 to 1358 karma, with less than half spent on attributes.
I haven't yet looked at contacts, but I think it'd be interesting to see what kind of karma costs they've been built with, especially since there's a quick contact table in Run Faster (page 180) we can use as comparisons.
Hopefully, this'll give you all something to draw your own conclusions from. I make no judgement calls one way or another where the data is concerned, these are merely the observations I've made based on character progression. Make of that what you will.