Not sure about the difference - both are compatible for Garmin 60/62
RAM-B-149Z-GA41U - R579.00
https://www.iwarehouse.co.za/index.php?page=shop.product_details&product_id=12388&category_id=115&flypage=flypage.tp-ecommerce.tpl&option=com_virtuemart&Itemid=1
RAM-B-149Z-GA12 - R502.40...