This is an interesting question! I'm not qualified to answer it myself but wondered if you'd had a chance to watch last week's Receipt Bank webinar?
Here is the link to watch it on-demand:
We are also running a webinar with AutoEntry tomorrow at 2pm. If you book in you'll be sent the link to watch it live, or later when you have time. AutoEntry is quite similar to Receipt Bank but does have a different pricing structure.
We're hoping both AutoEntry and Receipt Bank will be exhibiting at the Bookkeepers Summit in November. so you could ask them in person! Good luck making those decisions,