Drive both. Buy what you like and can afford. I've driven quite a few 911's, but never a GT3. I was always pleased with the driving experience they offer. I find myself more attracted to the "classic" 911.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.