Thanks Wendy!

Canadian Twin is made with cyclamate and the American is made with sacharin, Both are heat stable but the cyclamate tastes better. Interestingly, cyclamate is banned in the USA and sacharin is banned in Canada. Both are "tabletop" sweeteners which means they are for personal consumption only and cannot be used in commercial products. Hence the proliferation of aspartame. ace-k and Splenda sweetened products.
I have some American Twin but have not yet got around to playing with it yet.

Karen