Indeed - if we are really looking for a "few cents difference" and equally "does a couple of cents really MATTER to the observer/listener" - well yes - that's another question entirely - then - plucking a string (pizzicato) can be different from a bowed action.  I'm just wondering if "something else" is going on here....  dunno really.  I doubt if anything less that 5c would be ( between two isolated instruments ) would be noticeable - but really - dunno - - maybe, for a sustained pair of notes, you MIGHT hear a "beat frequency" at a few Hz or so - even so...   really just a thought experiment here.... and just throwing some thoughts and observations out..... Let me ramble on...   and feel free to discuss !!!!!!!

A "plucked" string will give an "initial impulse" and the string will relax into its normal vibrational decay mode, where it is under no external influence, and is what a tuner will observe (and will, if you could see the waveform, look more like a clean sinusoidal waveform, rather than the (sort of) saw-tooth waveform you would see from a bowed string (with the repetitive slip-and-grip physical mechanism of the rosined bow-hair occurring every 2.2 mSec or so - i.e.on a 440Hz open A, if that's the frequency you "choose" for the"A" - it's all your choice really depending on what you are doing.....)

A "bowed" string spectrum will be (slightly) different from a plucked string - it (a bowed string) is being "repeatedly temporarily held and released" in a slightly stretched state under the bow. 

It will be (on average) more highly tensioned (because of the physical displacement recurring rapidly, from the bow).  Therefore, being under a (slightly) higher on-average tension it will be (slightly) higher pitched than the result from the "decay" of a plucked string decay vibration, as measured by a tuner (of any type, clip on or external microphone picked-up app on a phone) - but - there is MORE to it than that I believe - read on.... ( 2 paragraphs down )

The ONLY time I have really seen/heard this effect is on Octave strings - and to my ear - yes - I can JUST sense that.   I do not have the aural acuity to hear or be aware of the same (although it must occur) on a normally strung violin an octave up from the D'Addario Octave strings....

As an aside, and ignoring my points about "what I observe with Octave strings" I believe this is one of the reasons why we perceive the violin/fiddle the way we do - unlike many instruments which produce a fairly constant pitch (excluding manually induced effects such as vibrato and so on, where possible, instrument dependent), a bowed instrument WILL without doubt have a "frequency modulation component" (FM - lol NOT FiddlerMan ! ) where the bowed frequency is NOT REALLY a completely "stable 440Hz" on an open A for instance - there WILL be, and there measurably ARE, admittedly at fairly low levels, frequency components around the frequency of the open ( or whatever played note ) string, giving a very specific sound profile.

Interesting..... (although not necessarily related to the question/issue in the thread, just wanted to throw my own somewhat-related observations in, is all )

Always curious about the physical mechanisms involved - feel free to discuss/correct/enlighten - I could be COMPLETELY on the wrong track, but right now, that's more or less how I see it for sound generation on a bowed instrument....