Well first of all if you don't have a controller you can't use sols. I also like the actual color temperature better on the Acan also not to mention how easy it is to program. Also has 7 prest manual setting. Including lighting storms. Just my option though. I also love kessils.
It's really a matter of preference then. They are both good lights can't knock them. I actually had a maxspext razor befor with 120 deg lens and I was very impressed with it also.
I use Sols and I use Acans. I like them both, but also have the Apex to control them. I liked my Kessil, very nice sleek look but i had the 350w which I could not control.
Depends on your tank. I like the sleekness of the acans on a rimless tank. If under a canopy does not matter as much. The prisms have some colors that come through that the sols do not so with that I would go Acans.