Yes it's near 5 years newer tech. Main reasons for e6100, quieter, more subtle power delivery (was already good), goes further on same battery and forward compatible frame (e6000 uses a different mount method).
Both auto shift and tell you pretty much sane info.
E6000 is a bit cheaper, might be able to swing more discount but there aren't many colour choices left, main thing gong for it, proven reliability, dozens of users have gone 10 to 20k miles without issue, which is always nice to know.
On e6xxx series I don't particularly like the push button shift, good news is you can use the e7/8xxx mechanical style shifter with them, pretty much plug and play