Honestly, dear, it is really too young to make very good predictions on whether your filly will be good at any one discipline or not.
Just share the pics for the enjoyment of her being cute and let that be enough. You don't realize, perhaps, how very quickly her babyhood will pass. Enjoy it while it lasts. It'll be a long time before you are doing any endurance riding.
Oh, and she is extrememly cute!
Agreed...especially with endurance, where you meed to assess muscle composition, although with that particular cross, it would be unlikely she would be a competitive endurance prospect...