Hi Melanie,
Now I'm curious about which tests are you mentioning. Also, Acme Packet/Oracle as many different SBCs models, which can be selected according with the customer's requirements.
When talking about the infinite number of features I wasn't really thinking in H.323. Although, probably there were customers like you a couple of years ago that thought they wouldn't need some features and regret they didn't pick Acme Packet, after they received new requirements on their networks. Acme SBC can also route using any SIP message element. Just use an HMR and according with what you want, just add a Route header (as simple as that... :) ).
Regarding traffic shaping, you can also do it based on media-profiles. Comparing traffic shaping with Acme Packet DoS protection doesn't make much sense. Their DoS is one of the features that made their SBC what it is now, the leader worldwide. And do you know what it means? It is tested against any tool out there performing attacks (more customers means more testing). Can you say the same about the ABC demo?
One additional thing is that you can for sure say that when deploying a Acme Packet SBC you won't have issues interoperate with other vendors. This is not marketing material, again this is based on the number of customers/deployments that exists worldwide.
Not to mention real HA (out-of-the-box), simple configuration (yeah, I've already implemented an P-CSCF using Kamailio and it was a mess...), transcoding, LI, etc.
Hope it helps,
Luis