Unagi E500 has around 12-14km range (likely less, depending on weight/height) tested on this site, whereas the touring has twice that.
Unagi is much lighter tho.
I would go for more weight and range, you might have to haul it up 4 flights of stairs, which would be different or last leg commute or …. Also, do you use it for shopping? Additionally, range will decrease over time and with wind. Wind cuts my speed down by 30% and limits the range. So i guess, i should have calculated with 50% of the tested range for such cases, too (not just low wind and warm).