All known anchors are good anchors. Make sure you buy originals. The measurements of all anchors are selected due to different reasons. Changing any of them will change how they behave on your boat or at the bottom.
All anchors claim they have a superior holding power. Some are better than the others on some types of bottom. None of them are superior to another on a general basis.
Make sure you have at least three different types of anchor. Two should be ready on the deck to change, the third should be the heaviest and can be kept in the cabin.