The answer to yor question depends on what you are training for. To take a rather extreme example for illustration purposes: If you are training for a road marathon then you need to be doing this type of aerobic base work on flat roads so the mechanics and speed are more similar to your intended event. If you are training to climb a big mountain then this workout sounds perfect. Pace on trails kinda just gos out the window really. The gradient and the roughness will be the big influencers of pace. If you’re training for a mountaineering goal then this targeting the specific uphill mechanics while hitting the metabolic bulls eye is ideal.
I hope this makes sense,