They're both flux, but the one on the left is specifically rosin flux(looks like hardened tree sap because it probably is refined from pine tree resin). The right container is just "flux paste" and could be any number of things that act as flux.
The small one, and we don't sell them. We offer pcb reverse engineering, fixing, fast prototyping, and more. For more info, please vist our site: www.reversepcb.com
