Shindaiwa has only two sizes of their Hybrid-4 engine, 24.5cc and 34.0cc. Stihl has 4-Mix engines ranging from 28.4cc to 40.2cc. I'm considering buying either the Shindaiwa M254 multi-tool unit with the 24.5cc Hybrid-4 engine, OR either the Stihl KM90R (28.4cc) or KM110R (31.4cc), both with the 4-Mix.. From what I've read in company brochures and on their web sites, the Shindaiwa has .8kw of power, or 1.1HP. The Stihl KM 90R has .95kw/1.27HP and the KM110R has 1.05kW/1.4HP. The thing is, I don't know how much power I really need. I will be cutting through high grass and small sprouting saplings from time to time. Will the Shindaiwa 24.5cc engine be good enough? The Shindaiwa price is about in the middle between the Stihl models, so I find it strange they offer a smaller engine size. Thanks for any insights.