So what?
No doubt the cable is shielded. "Possible" noise does not imply there will be noise. Resistance does not imply degraded "quality". Plus, that is a very short cable - soldered at both ends.
Soldered connections are ALWAYS preferred (in terms of possible noise and resistance) to a jack & plug connection. External speaker cables will have at least one jack & plug end, possibly two.
Using the standard rear analog connections requires much longer cable(s) to the speaker inputs - cables the may very well run parallel to several other power (including AC) cables and data cables (let's hope they have good shielding). Cables that are much more exposed and thus susceptible to physical abuse.
Again - as noted in post #4 above, there is nothing to suggest, as a general rule, that case front audio is inferior to rear audio. In order to make that determination, specifics about the motherboard's integrated audio (or sound card) are required, as well as specifics as to how the audio signal is delivered to the speakers. Everything else is just guesses and supposition, or totally inaccurate.