I have never owned anything Multitasker, however I love my 4Sevens Quark flashlights.
Funny, I've never owned any 4Sevens but my Multitasker is incredible. Honestly best build quality I've ever seen on any multitool. My tool's knife came dull, contacted Shane, the owner, he said it was because his knife manufacturer wasn't up to par. He switched knife manufacturers and offered to sharpen it for me for free! Probably nicest customer service I've had the pleasure of dealing with (on par with Newegg.com, my favourite customer service ever). I reviewed his AR15 multitool the other day, check out the link in my signature.