I take capsules, not caplets. I use ascorbic acid, not buffered or ester C. I note that the capsule is already disovling when I put them in my mouth, so I guess there is little or no difference between using the powder and the capsules.
I have been told that the taking high dose powder sttraight will expose the theeto to too much acid, and can eat away what little enamel I have left. Also, I find the flavor less than yummy, so I prefer swallowing the capsule.