the 2 type pots you are asking about are different and I can not says whats better.
Bears will get hot enough to remelt plastics,,
if you are remelting,,,
yes you want a stir.
it takes a lot of used plastics to make new baits.
I would just use a micro wave to remelt,, unless you have a big big pile of them..
also.
remelting is touchy,, a lot of guys will not do it.
If I remelt, I always add new fresh uncooked plastisol to them..