No worries Gerry
When you say easy to stop by hand do you mean pressure on the workpiece or literally holding the shaft with your mitt? Either way, yes, the air powered ones are far easier to stall than the electric ones (in my narrow experience of a Bosch GGS 27 fixed-speed model vs my current Kobe extended spindle model) as they rely on spindle speed for the cutting effort rather than mechanical force, but I find this a positive safety advantage, as if you happen to end up with an out-of-balance tool sudenly trying to wang around at 27000 rpm the electric ones are harder to hold on to and take longer to stop, whereas the air ones stop almost instantaneously and I seem to be able to get my finger off the trigger far faster. Plus which, the speed of the tool is nicely variable using tyhe trigger too. I know there are variable speed electric models but they are quite a lot more expensive and since I've got a compressor I might as well put it to use! The only disadvantage with the air powered ones is the exhaust air blows over your fingers, bloody cold in the winter months 
