Hi everyone I've just discovered this site, an...

Hi everyone I've just discovered this site, and it's great. My 7 weeks old son has been on S26 gold since he was born. The hospital advised me not to change him, even though this formula is one of the most expensive you can purchase. As hubby and I are trying to save a few dollars, does anyone know the difference between the Gold formula and normal S26? I know the normal S26 is about $5 cheaper per tin. I am also considering changing to Karicare after hearing peoples experiences taking their babies off S26. Ryan feeds every 3 - 4 hours, struggles to bring up his wind and has very sloppy, green poos. Maybe the change would suit him? Any advice shared would be great.