I thought TS FR was easier that the TS BR. But I also think it's easier depending on what you land first. If you do tantrum first, then the ts version is the front roll. If backroll is first, then do ts backroll.
Matt, that instructional was really helpful. Just make sure you edge all the way through the wake. I'm still not too comfortable on them. I definitely think it's the hardest of the 4.
I landed the ts scarecrow as my first ts invert. I would recomend learning the ts front first because it will better to learn in the long run. It will teach to stay balanced and land ts.