(I skimmed all the responses)
I may be missing something but the 2 workouts you are citing are designed to do different things.
I think Taylor -2 is pure V02 development work (improving capacity), and Dick’s -2 is power threshold work (building and sustaining power at near your V02 max). My interpretation of your posted data indicates they are doing just that for you!
My non-authoritative, enthusiast understating is that Taylor is using slightly different muscles and technique to prioritize V02 conditioning, which maybe allowing for better recovery between intervals and better recovery overall between days in the plan. Dicks is what I call “pure power” intervals. Sustained and hard, but not maximum heart zone. So at 105% it is intended to be a manageable hard work giving high training stress in the context of a plan.
So really, it depends what your specific goals are. I think if you do all your internals like Tayor, you will not necessarily build sustained, higher power capability. But all Dicks, and you might not build V02 capacity as effectively. And remember that our bodies’ different systems for physical output are not binary so training across different aspect is necessary.
I assume this is why the Trainer Road programs incorporate both types, and when you get to specialty there is more of a particular type of conditioning.
Because I am not willing to ride the trainer 5 or 7 days a week, I have decided to “adjust” my training somewhat with the information from Watt/kg (https://www.wattkg.com). The short version of the info is that data indicates 4 x 8min workouts in a structured 12 weeks of training are most effective at building improvement. (not entirely new knowledge but this site explains it well and provides some citation to the data. I’m sure Chad and Nate are well beyond the simplistic version here)
I am doing a 6 day stage MTB race next year (https://quebecsingletrack.com/en) so my primary goal is to build sustained power over the winter. I want to be able to output higher power for longer periods. Last season I built my cadence from nominal 75-80rpm to now 85-100rpm which has substantially improved my climbing. The low-level riding I do when instructing has given me a higher base this summer so my endurance and recovery are improved. (I just don’t get tired day-to-day and I can easily do 4-6 hours MTB rides). My plan (already started) is to adapt a TR workout to incorporate specifically 4 x 8min workouts and very moderate recovery as per the Watt/kg plan. My first observation is that the lack of variety in the workouts makes things a little less interesting. (We’ll see what happens)
(Hope this helps)
My sample 4x8 data is shown below just for reference.
FTP: 278 (Actually 285 but I run slightly low intentionally)