I had the chance to fondle a new 694, as I own a 692 and to me the only different is the palm swell is very large compared to the 692, the stock is fatter overall as well, balance felt the same, a bone stock 692 will balance right at the hinge pin as it's balanced already from the factory, although with the 694 you can obviously adjust that with the weight kit.........is that something that you need as a shooter? that's your call.
Nice gun overall, the blue is sharp, and enjoy it!!!!! as mentioned check the stock bolt, my 692 stock bolt didn't come loose like some are mentioning about the 694 but it's a good thing to check it!
Enjoy and shoot it well!!!!!