bwd12,
I have paddled both. I'm 6'4" 210lb and I prefer the 140 (I don't own one but I use one while practicing my fly casting because my SOT is so full of snag points

) When you ge a little practice you can lean to the side you are turning and that will help cutting the turning radius (experts can tell you what that is called)
Try both kayaks in the water, paddle for 1/2hr then rent the one you like the best for 1/2day and make sure it's the one.
Nils
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"The attraction of angling for all the ages of man, from the cradle to the grave, lies in its uncertainty."
From "FISHERMAN’S LUCK AND SOME OTHER UNCERTAIN THINGS by Henry van Dyke