The taste is the same. To be honest, you should be asking: liquid or
powder? Brand names don't matter. Some things, like hot pepper
jelly, work better with liquid pectin but you can make a liquid
substitute using powder.
http://www.gettystewart.com/hot-pepper-jelly-sweet-spicy-gift-from-the-kitchen/
If you want to reduce or eliminate the amount of sugar you use, try
the Pomona brand
http://www.pomonapectin.com/ I haven't used it, but
my jams turn out too sweet for me even when I use low sugar pectin, so
I'm going to try that one and see how it goes. Their store locator
says Whole Foods should have it.
--
A kitchen without a cook is just a room.