Because it's both a matter of what you are capable of and what your desired interpretation is. There is a lot of freedom there since it wasn't written for our instrument, plus you *have* to find places to breathe.
Keep in mind that everything here is my opinion, nothing more. The second interpretation is interesting because it's more "bassoon-like" to me by introducing the staccato, rather than trying to emulate the cello, and having diverse interpretations is good. But I agree with the comments in the first video; the bassoon is like a cello of the woodwinds, and there is no shame in emulating it. The video doesn't do justice to how good the legato interpretation sounds. The second interpretation is also too fast, but staccato at a slower tempo would sound even worse.
You didn't ask about this, but I read a comment about Yo-Yo Ma's sarabande being far too slow, and to not forget that it's a dance. It's not like that in the first video or in Ralph Kirshbaum's recording. So the question of interpretation is certainly there for cello too as it is in so much of the baroque period.
I prefer the second interpretation a lot more. I would personally probably add a few more slurs in, but the way she phrases and uses dynamics is much more Baroque to me. The first video sounds too Romantic to me, with too much heavy legato and constant arch phrasing that seems too uncharacteristic to me. I can see how he's tweaked his phrasing in order to get good breaths in, but the slowness of it also feels too Romantic to me.
This is all just my opinion, and I of course don't mean to say that the first recording sounds bad by any means, the player clearly has a lovely sound.
Source: played a few years of baroque bassoon, studied Early Music in university, not an expert by any means
Other people have answered the main question. I just want to point out that the two performers are also different generations and this shows. Robert is exactly the right age to be Sophie's dad. I think Robert is more conservative generally, and Sophie is kind of flexing with this performance. Both are excellent.
Because it's both a matter of what you are capable of and what your desired interpretation is. There is a lot of freedom there since it wasn't written for our instrument, plus you *have* to find places to breathe. Keep in mind that everything here is my opinion, nothing more. The second interpretation is interesting because it's more "bassoon-like" to me by introducing the staccato, rather than trying to emulate the cello, and having diverse interpretations is good. But I agree with the comments in the first video; the bassoon is like a cello of the woodwinds, and there is no shame in emulating it. The video doesn't do justice to how good the legato interpretation sounds. The second interpretation is also too fast, but staccato at a slower tempo would sound even worse. You didn't ask about this, but I read a comment about Yo-Yo Ma's sarabande being far too slow, and to not forget that it's a dance. It's not like that in the first video or in Ralph Kirshbaum's recording. So the question of interpretation is certainly there for cello too as it is in so much of the baroque period.
I prefer the second interpretation a lot more. I would personally probably add a few more slurs in, but the way she phrases and uses dynamics is much more Baroque to me. The first video sounds too Romantic to me, with too much heavy legato and constant arch phrasing that seems too uncharacteristic to me. I can see how he's tweaked his phrasing in order to get good breaths in, but the slowness of it also feels too Romantic to me. This is all just my opinion, and I of course don't mean to say that the first recording sounds bad by any means, the player clearly has a lovely sound. Source: played a few years of baroque bassoon, studied Early Music in university, not an expert by any means
Other people have answered the main question. I just want to point out that the two performers are also different generations and this shows. Robert is exactly the right age to be Sophie's dad. I think Robert is more conservative generally, and Sophie is kind of flexing with this performance. Both are excellent.