Question: To use a stiffer/slightly lighter racquet or a flexible/heavier racquet?

So I have finally found an acceptable stiff racquet that is maybe 12 grams lighter than my regular 360 gram Head Pro Tour 280. It is the Tecnifibre 325 VO2 max. Somewhat the same specs otherwise: 98 headsize, 20 vs. 21.5 mm beam, 18x20 vs 18x19 pattern. 

Difference is that I get more raw speed out of the Tecnifibre and sharper cuts on the ball, plus faster racquet head speed, greater spin. The venerable Head Pro Tour 280 gets bigger plow and weight on the ball, is more stable and the flatter kill shots are much better, my serves are heavier.

So far, I don't feel any jarring vibrations that would give me wrist or elbow problems with the Tecnifibre, and I like the idea of being to hit a faster ball. But I maybe giving up producing a heavy ball which is harder for my opponents to return.

Anyone with this same problem?