DD2 is 12mo 9kg and head near the top of her group 0 seat.
DD1 is still nice and comfy in her group 1 seat (3.6 years old, 14kg)
I'm not sure whether to buy a second group 1 seat for DD2, or to buy a group 2 seat (which DD1 is just under the minimum weight for) for DD1 and put DD2 in our existing group 1 seat.
Does anyone know how much safer a group one seat is compared to a high-back booster? And is being just under the weight limit a big problem?
Thanks