Who knows the difference between Demae Itcho(出前一丁) made in HK and in China?

I received, from my friend, some information about the difference between Demae Itcho(出前一丁).
I cannot tranfer all of them at here as I have to clarify whether they are correct or not first,
but one of the items I can say is .......
" those made in Hong Kong are using vegetable oil but in China, using lard(pork oil). "
Is it truth?