WAG bounder vs front handspring for tumbling?

[PressHandstands]

My sister is a L5. Her coaches make her train Bounders, also called Flysprings, a lot more than Front Handsprings.
She also does drills for Bounder - Front Tuck on mats and they want her compete Bounder - Front Tuck for L7.
When I asked her she told me they want her to do Punch Front Layout - Front Tuck for L8, because she is a "fast twich" kid and good in tucking.

I am a little confused because all of her teammates train Front Handspring - Front Tuck and I think a Bounder is a lot harder. However, I know that the Front Handspring of my sister used to be crooked but she does pretty powerful bounders.

I do not doubt her coached AT ALL, I just have some questions:

1) How hard is it to do Bounder - Front Tuck on floor? A lot harder than with the FHS?

2) Is this the progression for Front Layout - Front Tuck later?

3) Do you need to do FT - FT on floor before FL - FT or can you immediately start with training FL - FT if you can do Bounder - FT?

4) Do you think it is easier to get into Front Layout - Front Tuck with a Front Handspring or just punching into them?

Thank You