I used beef suet tallow that I rendered by myself and it traced super fast. My recipe was coconut 20%, castor 5%, tallow 40%, olive 35%. It was close to soap on a stick.
Several day ago I got tallow from Essential Depot, mixed it with lard (40/40%) and it is super slow. But the suet tallow is completely solid at Florida room temp, while Essential Depot one is very soft. So it seems to depend on tallow.
Well, I must respectfully disagree
and here is why.
Your first/fast recipe also included a combined total of 25% coconut and castor, both of which are fast movers.
Your second recipe included 40% lard, which is a very slow mover. After the 40% tallow, you don't mention what oils made up the remaining 20%. But even if it was all CO, it was still less than what you used in the first recipe. Just those changes alone would have made a significant difference in speed of trace.
Speed of trace would have been affected by the temperature of the lye and oils, how much water you used, what additives were used (including EOs and FOs), and how much you stick-blended.
Bottom line, unless you use the
exact same recipe (including all additives), and you also controlled for
all of the other variables, it's really not a fair comparison between your home-rendered tallow and the store-bought tallow. In my own experience, I've used both, and I don't see any difference in speed of trace. YMMV