My opinion lazer dual blades. They cut quicker and cleaner. Down fall is lazer can not reopen holes. Reopening holes knocks the pitch of the blades off and they will cut worse then dull blades. All blades will ice up in cold temps. Some worse then others. To help eliminate ice up I found after your done drilling your holes you want, drill 4-5 inches into the ice. This knocks the water off the blades so they don’t ice up. Hope this helps.
I’ve ran an 8 in. Lazer auger since strikemaster came out with it. Never had any more problem reopening holes than any other auger and sure couldn’t tell that it was hard on the blades. The thing that kills the lazer blades is any dirt in the ice. There’s thousands out there being used for this everyday.
Laser blades are nice but i prefer chipper blades. You can not resharpen laser blades yourself. I have a 1982 eskimo and I’m still using the original blades. I use a fine file to sharpen them up. Professionally sharpened laser blades are around 40.00. My buddy gets them reaharpend every year or two. So rhe cost saving is pretty significant.