You can but it's a big con. Your baby can stick with regular formula till he's one and then go on to full fat cows milk. So long as he is actually eating a good diet it's not necessary. Just another marketing myth to make you feel guilty.
Oh and OF COURSE he likes your milk better - formula of any type tastes rank and he gets a nice cuddle from you.
If you're still breastfeeding and he has other calcium rich foods like cheese/fromage frais, yougurts, he's probably doesn't need much other milk really, just a good splodge on breakfast cereal and that'll do. Cow's milk/formula isn't a neccessity in itself, he can get the same nutrition from other sources and with other fluid for drinks, water/breastmilk, he won't suffer.
OTOH, I found Hipp follow on was less dodgy smelling than others, that's what DD had - but I'm sure the growing up milk is vanilla flavoured? Practically milkshake lol, I would avoid it to be honest.