Each cropped version has its pros and cons, much like most everything in life, perhaps even in equal measure; the pros rip you off and yet it's done inside of a legal framework, and then there are the cons, which ripped you off outside the frame and got caught for their indiscretion.
The open crop has the advantage of the curved front of ice/snow on a bias to the horizontal, opposite to the bias of the fluid water. To my eyes that's a "pro". That serves as a pleasing frame directing your eye toward the center of the photo. The scythe-shaped form is the centre-of-attention and opens to the right side, therefore anything behind it becomes a dead zone and you have a significant dead zone, that's a "con".
The scythe directs the eye to the right, right? Accepting that interpretation means that the second tighter crop works better because there is a diminished dead zone (pro), but then you also lose the foreground curve of ice/snow (con). It's usually better to have the centre-of-attention slightly off center. If the subject has directionality then more canvas should be given to the open direction and less canvas to the dead direction. If it's a bird looking to the right, then move the bird to the left of center so that it looks into a biggest portion of the frame. Same principle, except that the scythe form is the equivalent of a bird.
I'm sure that you have already made up your mind as to what you like better.
