what? accidental apt-get upgrade

i've got a readynas pro 6 running os 6. i was on 6.10.2 and... i know it's a hard and fast rule, "don't apt-get upgrade", but i did.

problem is i was ssh'd into the wrong device. thought i was remoted in to a debian mac mini. ip's were too similar. i think in the future i will alias apt-get to a nag script reminding me not to use apt-get....hehe. several dpkg errors occured, which i tried to 'fix' with apt-get -f before the lightbulb went off over my head and i looked a little harder at the hostname on the bash prompt....ouch

anyhow, if after doing an erroneous apt-get uprade, if i do a firmware update to 6.10.3 via the regular, real, and only upgrade route, will i be able to pretend that the apt-get upgrade never happened? lol. i guess what i'm really asking is, will the firmware update from the readynas os 6 admin page rewrite all the debian underpinings of the os? or does it do some kind of delta upgrade, potentially leaving me with a now unstable system?

update: firmware upgrade to 6.10.3 went off without any issues...am i ok, or do i need to do a factory reset to straighten this out and prevent future issues?

thanks in advance