The only real difference is on the weekends. The indoor / outdoor plan gives you two options for a workout. It is either an outdoor workout or a workout you can do indoors on Zwift. The weekday workouts are pretty similar. Mostly it comes down to the amount of time you are riding, since all indoors, and using that time wisely.
Yeah they are both pretty much the same. I would just recommend the indoor / outdoor plan than you have that option and can see. The weeks are basically the same workload and same workouts.