Both of your drives are fine.
Regarding your seek error rate and read error rate, they appear healthy although Seagate never have publicly published how to interpret the raw values.
For Seek Error Rate the values are believed to report lifetime seek errors in the first 4 bits and lifetime seeks in the final 8 bits. In your case both drives are reporting zero errors so the value contains just their lifetime seeks. Your good.
Read Error Rate is a bit more vague and take this part with a pinch of salt but both your drives are reporting a sector read error between 1 and 10 errors per 125GB read. Take this with a grain of salt as really I'm not sure if I have worked that out correctly, someone may come in here and say I'm talking rubbish with the Raw Read Error Rate.
Aside from the SER and RRER your drives are fine, no relocated sectors, SATA cable appears to be good, Load/Unload cycles are very low for the drive you have had the longest, this *should* not fail within the typical 2 year warranty, hasn't been dropped and the drives are very cool running (not that temperature is too big a problem - as per Google's HDD survey). Anyway your drives are a-ok.