TrainNow just looks at your history and offers a workout based on that with a general plan of building fitness. There is no driving factor, no recovery weeks or anything approaching the complexity of a training plan with TN.
Training Plans, with or without Adaptive Training, have a very specific aim and progression with a target event or training emphasis driving the entire plan progression. These include loading and recovery weeks, different phases of training that include different workout types.
Two very different approaches, so it’s practical to see differences in their related workouts at any given time.