Mine has a similar scar behind her ear from a headcollar too, but luckily you can only see it if she is plaited up When I got her from a sale many many years ago she had bad rubs in the same place as Ginger's scar, but they grew out.
Both our mares have certainly landed on their feet now tho
Keep pictures of little Willow coming, would be lovely too see how she turns out, she doesn't look like a teeny tiny foal so may well make bigger than Mum, fingers crossed for you
Im 5''4 or maybe 5''5 so anything bigger than 13.2(which is how big Ginge is) would be fine, Willow has grown a fair bit already as on Thursday she could get between mums back legs now theres no chance