There are slight differences in the bodies I see but can tell they are basically the same design, especially the Mac & Husky shells.
I did notice the sound of an orange one I saw emitting that same distinct note as my friend's Weed Eater, which had me wondering. The orange Husky you have shown now explains it. Very happy to have picked up these tidbits of info regards the brand sharing here.

I have a Kazaa straight shaft whipper snipper I splurged on in 2005. I felt I deserved a high quality weed whacker so chose the most expensive model on display at Bunnings. The staff member said it would fit the bill as far as being up to the toughest tasks. It has a Mitsubishi TU26 two cycle motor that takes 25:1 mix so has the added bonus of taking the Victa fuel just like the Ryobi, without the need for a separate mix.
The power delivery and smoothness is superb and continues to serve me very well, though it has always had a problem with fuel dripping through the fuel cap due to a dicky washer I just couldn't be bothered to chase up. I use whatever is on hand which only fixes the leak for a short while before I have to stick any old washer I can find in again and that fails too.
I just try not to tip it sideways, and everything's good.


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!