There are several reasons for this... Google URL Shortener is a pass through service that measures every single click, while Google Analytics is a JavaScript based solution that provides the majority of the data.
ມີຫລາຍໆເຫດຜົນ ສໍາ ລັບສິ່ງນີ້... Google URL Shortener ແມ່ນການບໍລິການທີ່ວັດແທກທຸກໆຄັ້ງ, ໃນຂະນະທີ່ Google Analytics ແມ່ນໂຊລູຊັ່ນທີ່ອີງໃສ່ JavaScript ເຊິ່ງສະ ຫນອງ ຂໍ້ມູນສ່ວນໃຫຍ່.