On one level, they are basically the same thing. What I see taught of love in the New Testament, is basically what I see taught in Buddhism. However, there are differences. The underlying philosophy of each respective religion is different, so their shared concepts of love/compassion will have differences. In Christianity, there is one who loves, and the one who receives the love. There are concrete concepts of "me" and "you", separated. In other words, there is a "me" who does the loving, and a "you" who receives it; there's a clear cut concept of "me", "you", and these are separated. In Buddhism, there are no concepts of "me" and "you", both are empty of any self-nature. Therefore, the love isn't something that's done to someone else, but just a natural state of being, with no one who loves, and no one who receives the love.