If you want a more direct comparison to the Acolytes, try the Sphere Match. It's a fairer comparison and, at 13', this Sphere just pips the Acolytes on weight
As for the Spliced Tip Spheres, their awkward lengths make them more difficult to compare directly to anything. However, they are still lighter than any other spliced tip rod I've encountered, even though they are six inches longer than the rods you might reasonably compare them to. I've never noticed any tip heaviness in the 13'6" model, but it's certainly apparent in the 15'6" rod. It's nowhere near enough of an issue to put me off the longer variant.
I consider the Spliced Tip Spheres to be the best trotting rods I've ever encountered. I've had no issues with anything from dace to double figure barbel (which actually surprised me). As much of my fishing revolves around grayling, their ability with them is paramount. Over the past month or two, I've been using alternatives just to check my thoughts on the Spheres. As far as I'm concerned, nothing compares, regardless of the price.
Strangely, though it's a good rod, I'm not quite so enamoured with the Sphere Match (waggler) rod.