planning to buy mistblower survey around for Stihl brand got two variants.

SR420 - around RM2k
SR5600 - aroundrm750

On paper the spec is exactly same. Anyone know what's the difference between the two? Why the 1.3k price difference?

Is it worth it to get the cheaper or maybe better to just as well get the 40cc no name brands like ogawa/kasei/diamond for rm400?