E-mail Ray Brown at BCY (e-mail addy it at
www.bcyfibers.com). He can give you the details on the differences. I don't know of a contact at Brownell, but it wouldn't hurt to ask them also if you can.
As far as which is better, that will vary depending on who you ask/who answers on this thread. I haven't tried TS-1, but I do prefer Dynaflight '97 over the materials I have used. I only deal with BCY due to their customer service, and due to a conversation I had with a Brownell representative some years ago.
I honestly think that when one company comes up with something that works, the other will have something very similar.
Chad