Safety wise, yes, a 100quid lid will probably do the same as a 500quid lid, but hopefully you never need it to do its job, which is why comfort and build quality should be the deciding factors. 100quid or 500quid, its still a large investment, so make sure it fits well, isnt too heavy, and feels well constructed. try some of these: Most important - make sure it fits properly! snug, but not too tight to give you a headache! Pull it up and down to see how it moves about - you dont want it lifting at high speed. Try opening and closing the visor a few times, does it look like it seals properly? Take it apart to see how the visor comes on and off. Try the strap to make sure it does up easily (and undoes!) See if it has removable padding so you can wash the inside when it gets stinky! Check the air vents are easy to open when wearing gloves, Make sure you can wear (sun)glasses underneath, See if there is room for earphones for intercom... etc etc.. Basically the more expensive lids do tend to be better quality, but if you're only a recreational biker, the cheaper lids may well be ideally suited to weekend rides, wheres the Shoei's will be better for daily use as they are better constructed IMO.