Buy the one you enjoy shooting more. If you like it better, you'll shoot it more often, and you'll probably shoot it better. I own guns in both, and I simply prefer the 1911 in .45 over any other handgun I've ever shot, so I carry it instead of the 9mm I bought for CC. I just feel more comfortable with a few big bullets over more little ones.
Eric
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Teach a kid to shoot. It annoys the antis.