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; also some edging. Will the Shindaiwa 24.5cc engine be good enough? Will it lug at times? 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.