In simple words, if you are looking for weight loss, then HCG is considered the best. Whereas if you are looking for increased metabolism as you get older, then HGH is best advised.
hCG is initially preferred to treat infertility but then nowadays many are using to lose weight.
As you age the HGH levels (human growth hormone) tends to get weaker. HGH, on the other hand, helps people to bring back the lost virility and vitality in their life by boosting the sex drive, increase muscle tone, enhance sleep, reduce wrinkling and boost the immune function.
Both are entirely different health programs and help your body differently. Go with your preference.