Hey Ginny, sorry for the delayed response! I'd say the Zuma is noticeably comforturabler <-- might be getting a little tired here but I'm standing by that thought!
The Zuma has a larger seat with more padding, larger grips with more padding, larger tires, longer handle bars and a sprung saddle which uses rubber bumpers. Now, the E3 Metro does have a suspension seat post which is nice but you could always add
a Thudbuster to the Zuma and it would provide >= travel and comfort.
26 miles is quite the ride and it really depends on how many cracks and bumps are in the road or how many sidewalks you'll have to go up and down etc. when considering the value of comfort vs. utility here. I also like the basket on the E3 Metro but there are lots of accessories you could add to the Zuma to carry panniers and stuff (and you'll have plenty of money left to do that considering the $600 difference between the bikes). Note that bags and other add-ons might be more prone to damage and theft vs. the built on rack of the Metro so keep that in mind if you park outside or in risky spots. Consider starting a thread in the
ebike accessories forum here asking about racks/bags later if you go with the Zuma and I'll do my best to help you out
Both bikes have the same battery capacity and design, and the same motor, so aside from comfort you could always grab an extra pack to charge at work or carry along if the range ever becomes an issue. The low-step medium 18in (46cm) Zuma seems like a pretty tempting option for you and if you like the style and are willing to pay a bit extra for those after-market racks I think it could be a winner! Again, this is coming from a sort of skinny weak guy who has been in multiple car accidents, snowboarding accidents, surfing accidents and has pretty bad knees now and whiplash (most recent car accident was just last month going 65 mph with some friends... no I was not driving). I care a lot about reducing vibration and start to hate riding bikes every day when my back and neck get whipped around, this is only exacerbated by the added weight of a helmet and the forward position of most road or mountain bikes so I think you're on the right track with both of these models. So anyway, there's some context for you and here's a picture of me crashing into a road on my snowboard