My two cents but, for half the price you are losing IR blaster (which is on your phone probably anyways) and the health stuff and gaining null rom and a more open interface. Yes, it is not as water resistant but Ive put mine through hell and it works perfectly. and the camera difference? the camera is good for emergency photos thats it your not gaining much with .1mp. and Yes both watches run Exynos 4412 as stated before which Nulls kernel unlocks to 1600/Dual core.
I wouldn't pay $150 more for IR & the extra stuff...plus its tizen. I will be sticking to my G1 until the price of the Gear 2 drops near its end of cycle for the Gear 3, or if the G3 is a major improvement go for that.
If you dont have a G1 though, just do some research because G1s can be found for $150 everywhere now and it saves you a lot. plus if you REALLY care about the "music player" aspect, Tizen G1 update will bring that so...
there you have it