The EVX-R70 has better specs for the receiver, it has a bigger (better) cooling fan than the 7000, and it also has an added heat sink on the transmitter. It will also do DMR Digital or work as conventional analog. As JohnE alluded to, it's really just a re-badged Motorola XPR8400 machine - but uses different CPS software. (make sure to toggle the software setting to 'expert' mode if you want to see all the parameters available.)
That said, for all it's good qualities, it's still really just 2 XPR mobile radios inside a box. I've been happy with the EVX-R70's I've set up. It's also nice that you can buy the EVX-R70 used for 10 to 25% less than the same thing with a Motorola label. The EVX-R70 is good and reliable for "regular" service - but they're really not 100% duty cycle 24/7 machines. I would never run one over 25 watts if I wanted it to live for years.
