What I will look at first is the cost. MAC Studio Finish is £15 for 7g thats £2.14 per gram. The Bobbi Brown Creamy Concealer is £18.50 for 1.4g. so £13.21 per gram. WHOOW! what a difference! You get a lot more for your buck with mac!
Next up the appearance straight away you can see the BB Concealer is creamy does not need to be heated up or moved around the brush to get a good amount of product on the face. I think this concealer would be great for dryer skins.
The MSF Concealer requires a little more working and heating to get a good amount of product and blend into the skin.
The MSF also has a more of a cakey look upon application however when blended sinks into the skin.
Both concealer performs well under the eyes however I feel the MSF is better suited than the BB to blemishes it has better staying power. This brand also has something called Silica which helps absorb oils most likely useful for any oily skinned gals.
Both concealers last around 4/5 hours under my eyes however MAC lasts longer on blemishes.
Both Concealers require powder to set for a lasting finish. I find patting rather swiping is better over concealer to not disturb the product under neither especially for pin point blemish concealing.
So rounding it up Id say Bobbi Brown Creamy Concealer is far more for under eyes or dryer skinned types and MAC Studio Fix Concealer is a great all rounder with added benefits for oily and blemished skins.
With the cost difference per gram I would pick MAC for my every day concealing.
What is your Favourite concealer?