EELCO DEULING I have tested TextSoap and Clean Text and settled on Clean Text because it's cheaper.
They offer more or less the same functionality but TextSoap wins: it's more simple to write your own actions and the services are more useful than those of Clean Text.
However: Clean Text offers all I need out of the box. I don't mind opening the app and make all the tweaks I need in the app. If you want to automate everything and don't mind paying more (and enjoy a more refined interface) you will like TextSoap more.
(Version 6.5)