[MMM]

Jim Breen has lots of things SpaceALC doesn't, and vice versa. I usually have both open at the same time.

For example, a word as fundamental as 金星 (planet Venus) is "dazzling victory" in Jim Breen.

On the other hand, many katakana names appear in Jim Breen that don't appear in SpaceALC, so when in doubt I check both.