For most players, the TSi2 will be the most forgiving, while offering a great combination of distance and accuracy.
With that being said, slow swing speed players might find the TSi1 a bit easier to hit, because it launches high while generating more backspin than the TSi2.
Ultimately it comes down to swing speed. Players with a moderate or fast swing speed should find the TSi2 the most forgiving, while slow swing speed players should find the TSi1 the most forgiving.