i think they are the same and stick to free post only.  the way i see it is $149.99  with free postage which is fine , then for the same object with an express postage it says free  express postage , should they both be $149.99  how can yo charge $10 more for  free delivery.  that would put me off straight away  he should just leave them as free standard postage but if they want express charge extra. $10