Dear MNShubert,
I don't know of a comparison chart. Although several of my clients have compared these systems, each has had different criteria for making the decision.
The bad news is that you really need to do your own detailed investigation. The good news is you'll find out which system is right for you, rather than for someone else.
I don't think you can choose such a complicated piece of software based on the standard vendor demos. You need to develop use cases based on your top priorities and have each vendor demonstrate how their system would handle those cases. For instance, if you give a higher seating priority to donors, or top donors, or donors based on years of giving, or members based on years of membership, you would ask each vendor to demonstrate that. If you need to accommodate discount codes or pre-sales, you would ask to see that. If you sell season packages, you would ask to see that, and so on. You should grade each vendor on how well they handle each case. You should also do your own hands-on testing of each system -- including testing them on Macs -- and grade those tests. Finally, ask vendor for references for clients who chose their system over the other one.
Robert