i have a stealth that i have been using for 4 years that cost 40 dollars and a swiss at 400 and aside from a little bit of noise difference they are the same . stealth also lists their throw as half so a 1.5mm is 3mm and a 2mm is 4mm throw . they measure from center to one side instead of top to bottom . i also own a hawk - 2 blunderbuss' - and a few others