Oil and capsules made from the same extract deliver the same compound. The choice between them is about how you want to live with the product day to day.
Control
Oil wins. You can adjust drop by drop, which matters most in the first few weeks while you are finding a routine that suits you.
Convenience
Capsules win. Nothing to measure, nothing to hold under your tongue, nothing to spill in a bag.
Taste
Cannabis extract has a distinctly earthy, herbal taste. Some people like it. If you do not, a capsule bypasses the question entirely.
Which should you buy first?
If you are new to CBD, start with oil so you can adjust freely. Once you have settled on an amount that works, capsules are an easy way to lock it in.
TODO(content): full-length version to be authored in WordPress.
