I'm a long-time user of the MAC Studiofinish Concealer. In fact, I'm about to finish my third pot already! On average, each pot lasts me for around 4-5 months of heavy use. That's not bad for a P1,000 concealer, eh?
I know there are more opaque concealers out there but I always go back to MAC because of an almost perfect shade match with my skin (NC30) plus how natural it looks when worn. It marries the right blend of opaqueness and naturalness for covering blemishes, and it comes at a reasonable price point too! And I never break out with it.
So! While I love the Studiofinish, when the time came to buy a new pot, I decided to try the MAC Studio Sculpt Concealer (P1,000) for a change. I wanted something creamier, a little bit more emollient than the harder Studiofinish. Actually I was just sawa (tired) of seeing Studiofinish after two years of using it, hehe. Do you ever do that, buy something else even though what you have is already perfectly alright?
Coverage and finish. Coverage of the Studio Sculpt is the same as Studiofinish. Both don't go completely opaque though, so for really dark blemishes, I use something super heavy duty like the Makeup Forever Full Cover Concealer.