Better Indicator Of Growth - Pre Or Post BPFSL?

As the title says... which do we think is a better indicator of BPEL growth and progress?

On one hand, Post BPSFL shows the stretch made during a good workout and has often been viewed as the "preview of what's to come".

On the other hand, it feels to me, that getting up in the morning and seeing the "untouched" Pre BPSFL going up would be a better indicator or length efforts paying off.

Wondering everyone's input while I'm still at the start of a year of Hybrid Training.