I think the Presencia 60wt cone is actually less expensive at Red Rock Threads. They sell the cones for $25.95 plus a flat shipping fee of $5.95 (no matter how big your order). Here is a link:
https://redrockthreads.com/presencia...0wt-thread.asp
I personally don't like using a cone on my sewing machine because of the need for a jar or thread stand behind my machine to hold it. A spool of thread is much more convenient for me (and appears less attractive to cats). In terms of the spools, Aurifil 50wt is less expensive than Presencia 60wt. However, in the cones, Presencia is less expensive. I have been wanting to try Presencia for ages, so when my Aurifil runs out I might give Presencia a try.