yes, this thread is about him making money with alchemy or inscription.
actually if you look two posts before that one you replied to you'd see the response to that. you suggested alchemy gives a two person mount perk, which the OP said he doesn't care about perks. so I did respond to your off topic post. lets try to stay on topic
On topic: alchemy is much better for leveling and making money before you hit level 80-85. when you get max level people will want best in slot trinkets and you can make a lot more profit with inscription... you'll need high end mats though.
here's a comparison... people will buy stacks of 5-20 elixirs for leveling alts 1-60 these elixirs can sell for around 5 gold each depending on supply vs demand on your server. a stack of 20 elixir/healing potion can sell for 100-150 gold, generally due to the cost to make them and reasonable profit margin. your mileage may vary, but you'll get at most a couple hundred gold for a stack.
on the other hand, consider the darkmoon cards. I could sell greatness card for 10,000 gold around the end of the expansion....probably much more around the release of wotlk. this being that greatness gave +90 in a stat, +300 in a stat on a proc. so strength for example, this was BiS for a long time. only made obsolete by the similar trinket from ToC....that was far into the expansion, and still greatness was easier to get from AH than it dropping in the raid.
alchemy will never compete with inscription if you can get the mats and successfully make the trinkets assuming they're best in slot still. I don't think the darkmoon cards will be as good in cataclysm as in lich king, but they will still be decent. they will probably be replaced sooner than in lich king. still, if you do it right you can make and sell them for at least 5,000 gold. alchemy will never be as profitable. the more cards you sell the wider the gap. inscription also makes plans and recipes, schematics in cataclysm, amongst other things. at max level with access to mats inscription beats alchemy and most other crafting professions by leaps and bounds.