Sure:
Monitor +4 vs Rendondo -3
Window vs Gayley
Antelope +3 vs Venado
Geiger +2 vs Wrangell -2
These may be anomalies, I haven’t done an exhaustive search and acknowledge that PLs are, to some extent, subjective. But to me these are examples of 1hr workouts which are mentally and physically much harder than 1.5hr at similar levels (time constrained athlete, so 1-1.5hr is my universe).
Regarding PLs not LfL:
For me, and could well be just my physiology and time constraints, the SS workouts (e.g., Venado+1, 7.5) became daunting and draining towards the top of the PL range but my Threshold I still wanted to grow (PL 5.5). Vo2 - Bashful+1 did very little for me at 7.1 (didn’t even feel close to a fish out of water, HR at level of SS work) which was after increasing it from PL 6 the week before, so was looking for 8s to find something hard for next week, but the 5.5 threshold were still solid. Ultimately work + newborn stress told me I needed a recovery week and didn’t see it through to level 10s (had 2 weeks left of Base II), which I’m kind of thankful for as the >7.5 SS 1hr look horrendous and probably too much for straight out of bed 5:30am.