Hi, I don't like product comparison, they always outdated, subject to change often, and don't aim on the correct subject, which is what is your need ?
For example:
1- If you want to do other protocols than HTTP/S, then SoapUI is already out because it support only HTTP/S (+ JMS, with effort and add-ons)
2- If you don't want to manually enter your scenario and data in Request/Response, then SoapUI is again out, because only CA SV provides features like magic data/magic dates that allows to record, automatically apply dynamic rules to your data and so replay, even months after recording without data issues
3- Do you want to have your injection data in excel or launch your test case from a web GUI with reporting of results ? then again soapUI doesn't support this
On the other hand, if you just need a quick solution, nearly free of charge, to test or mock a few webservices, and if your company doesn't have any DevTest license, then go for SoapUI.
Please, confirm your needs so that we focus on what is necessary for you.