As cast, there is a big difference on the flow bench
Have not compared them on the dyno as of yet.
But there is a clear advantage to the Trick flow as some of the work needed to make the Edelbrock work better is already done
I had intended to include a comparison of the Trick Flow RB intake against a Victor in my last dyno session. However, the port alignment was a good bit off between the two intakes and I didn't have the time (nor want to spend the $) to get them milled to equalize the differences.
FWIW, I also believe there are some things about the as-cast Trick Flow that give it an advantage over an unmodified Victor.
EDIT: Based on the pics of the Speedmaster intake I've seen, I suspect that one of those would require a good amount of work to even be the equivalent of an unmodified Victor.
