If you're saving money, I'd go with the cheaper Outback with the rear hub motor. Voltbikes has a decent reputation.
That being said, if you're aiming more for commuting/food delivery in an urban/suburban area, and not off-roading, I'd personally skip the full suspension of the Outback and 3" wide tires and look at their Bravo with 2.1" wide tires.
Otherwise, it's the same bike, and probably better suited for such purposes. The thinner tires will also probably let you get away with riding on a slightly lower pedal assist, which is always good for battery life.
I only mention this because I know a couple of pizza delivery guys at the shop next to me, and we've chatted about e-bikes. For the record, they both use this...
The Amego Infinite, with included front and rear lights, fenders, rear rack and kickstand, is a fully loaded city bike. The 500 watt motor and big 624 Wh bat...
www.amegoev.com
If you're in the US, note that all the Amego prices are in Canadian dollars, but they ship to the US, as they have 2 warehouses in the states, so with the exchange rate, it might be worth looking at.
It's not as sporty looking as the Volt bikes, but the Amego is by far the most popular food delivery e-bike here in Toronto. One of the delivery guys has had the same bike for 3 winters now, and no problems other than regular bike maintenance and buying an extra couple of batteries.
I think it helps that Amego has a physical store, and sells everything from their own brand up to high end mid-drive bikes.