I have to agree that the Shutter is definately more middle-of-the-road in terms of play/design. It’s a comfortable shape, sensible size and plays neither too solid nor really light. I think for this reason you’re more likely to get more people enjoying the Shutter. On the flipside, since the Horizon is bigger, narrower and plays rather solidly, it’s a bit more polarising and so if you’re unsure exactly what you like in a yoyo you might be more at risk of not liking it.
If I personally had to choose between the Shutter and the Horizon… I really don’t know if I could. If I had a gun to my head I’d probably go for the Horizon just for the fingerspins and perceived slightly better stability, but it’s really an incredibly close call.
However, the Shutter has the advantage that it comes in a dazzling variety of colours, including those gorgeous new polished rim editions, whereas as the moment, the Horizon colours are somewhat limited. Hopefully as time goes on we might get some new colours for it.
Really, you’re getting a great yoyo whatever one you choose, so you’re best off going with the one you like the look of the most.
Shutter = Wider, smaller diameter, lighter (that the Horizon) playing
Horizon = Narrower, larger diameter, solid playing
For your time: