They are not all created equal, even those which are basically the same design.
I've had two in the past. On the face of it they were identical except for the colour, but the reality was that one worked noticeably better than the other, the grip of the blade was better and the ride was better, too.
I don't have either of them (I wish I still had the Eclipse one), but I do have the Veritas one, bought when I had plenty of disposable income.
It is a nice piece of engineering, but I rarely use it. I do use it for spokeshaves (I've been using it today, as it happens) but that is only because it holds small blades better than I can.
I learned how to hold a chisel or plane iron for freehand honing when I was a lad. I guess it's like riding a bike, once you learn you never actually forget. So apart from spokeshave blades, all mine* get done freehand and the Guide gathers dust in the drawer.
*There is one other exception. I use it for my Bevel Up planes, because on them thehoning angle determines the cutting angle, whereas on a traditional Bailey plane, the cutting angle is set by the bed and I'm only honing for clearance, which is much less critical. But they are not my go-to planes anyway.