We use a mixture of Dr Browns and Tommee Tippee. Ds seems to get on fine with switching between them. We tend to use the TT ones at night, as they have variflow teats which allow him to guzzle at whatever pace he wants - hopefully quicker!
We haven't had any signs of colic, but I have to say that the Dr Browns bottles have a lot of parts (6 altogether!), which is annoying when sterilising (hubby keeps missing bits out, so we have to run the steriliser again), especially as you have to touch the inside components when assembling it. TT teats can be assembled into the screw on ring before sterilising, which means you don't have to touch them again.