What's the difference between ReConvert and UpOrder?

[omgbeauty]

I'm looking for some help in finding out the difference between ReConvert and UpOrder.  I've recently taken over a business that is using UpOrder, but I'm finding it hard to work out what the main difference is between the two and if I need to continue to use UpOrder, when it sounds like ReConvert will offer me the same thing.