I have both and love both for different purposes. I would get #2. Either will give you a volcano if you go too fast but #1 more so. I use #2 in carboys when mixing and blending in Large Brute containers.
I agree that #2 is the better longer lasting option! I use mine also in 1 gallon containers but to do so I had to grind down the screws right to the point where the nut finishes otherwise the screw sticks out to far.