I wouldn't worry too much about the other grandmother knowing more OP, every baby is different anyway.
She may be a bit more up to date on current guidelines, but thats easy enough for you to find out anyway. The only real changes are safe sleeping guidelines, slightly later weaning (although not all parents follow that) and rear facing car seats are recommended until at least 2 years (not by law yet, but that'll likely change). If you want to read up on it a bit then the nhs pregnancy, baby and toddler section has lots of information with the current guidelines and recommendations.
Oh and apparently the pushchairs are more difficult these days!
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