I just finished wading through the last bits of the Aikido vs. Wing Chun thread and noted that several people posting also study some ryu of Karate (or similar art) as well as WC. Now many of us study other arts or do some cross training. But most of the folks I know do either Karate or WC/WT. Few continue to train in both as there are a lot of really fundamental differences between these two arts. If you train both, what is the benefit you see? And, how do you handle the contradictions in approach?