We use a HA formula as both DH and I have food allergies so Sam's at a high risk for developing them himself... and the Ha formulas are supposed to help minimise that risk.

Is there a risk of Nechema developing allergies? They class this as having a parent or sibling with food allergies.

The AR formulas are thickened to help stop them regurgitating... is this something you need?

If you don't need any of those things, then I'd be looking at trying the cheapest option first - likely to be the Heinz, from what I've seen.

Just one thing... The karicare HA formula seems to be responsible for explosive diarrhea in many younger babies, I'm not sure how older kids may go on it.

BW