It's called "the agony of choice"
i.e we all go through this same feeling now and then. Some of us, almost permanently.
The best thing would be to try both, but if you do not play the instrument you cannot do it personally. Closest best is to have someone who plays flute give them a try. And the teacher you plan for your daughter would be a very good candidate.
Also, teacher's opinions may be important because sometimes a teacher can be a little biased pro or against a brand. Of course one is free to make one own's choice, or simply change the teacher, but in my opinion, it is preferable not to contradict teacher preferences from the very beginning. There will be time to do that in the future, if it becomes necessary. Your child may also have much to say when the moment arrives.
Some members have given their opinions in this Forum, concerning this potential problem with teachers and it has been subject of debate in the past.
What I am saying is just my personal position, as I consider the teacher to be one of the most important factors in the success of a learning process. Perhaps, even more important than the difference in the instrument, if we talk of a reasonable level of quality and for beginner levels.
I hope I am not confusing you still more.
Short of all that, you can take other's experiences into account, but they are all relative.
In my case I own an old Gemeinhardt (a vintage model M2). I think this older model has been replaced by the SP.
I used it for four years when I started learning the instrument and it served its purpose rather well. Then it began to have problems: pads leaking, screws that did not hold in place, adjustment problems and the like.
So I bought a Yamaha two years ago, of the intermediate series (YFL 600). There is a *big* difference between them although it is not fair to compare them, as the Gemeinhardt is 30 years old, with different mechanics and a more primitive headjoint.
The YFL is new, silver made and more sophisticated. Price difference is also*big* (in the order of 2,000$...)
In spite of that, if the instrument is mechanically OK (keys, pads not leaking, no dents, perfect blowing edge), I would go for the YFL 211. Many people are very happy with this model and you save 300$.
Good luck.
<Added>Sorry, I mean that YFL 221.