GOLD ETF , weight and price

Hi All, Gold Bees(**Nippon India ETF Gold BeES)** the biggest one in India is around Rs 66 per share and say HDFC /ICICI ETF is around 68 per share Now when for both of them the underlying gold per unit/share is about .01 gm why is there this different in the price for each of them .. Also, i see the closing price per share is about 1% more than the NAV value the funds declares for that night . why are people paying premium to the NAV can we know from any of their report (if you could guide me their audited report about holdings ) as to how much gold the fund owns/stores and how many ETF shares are issued against this stored gold. , so that we ourself can calculate the weight per unit /share Also, does this price include the taxes which govt imposes during import like agriculture cess etc (i know GST is not included) ..say govt increases the import duty , so will the ETF price increase