Doug is right on this one. If a 100 people looked through them not knowing which is which & told to choose the best I bet it would be close. The slc has AK prism which tends to have higher light transmission but when I looked through my meopta next to the slc hd I didn’t see much difference at all. Only thing I thought was the slc maybe had slightly warmer color & meopta with a slight yellow neutral. The sandy dry desert dirt in the slc didn’t seem quite as yellow as the meopta. CA control was even. In the middle of the day I couldn’t see any difference in brightness, both were bright & super clear. Another big thing meopta has going is resale value & a lot of people who want to buy a used one in mint condition. I might have to call Doug & buy another meopta 15x because I sold mine a few years ago. I would like to see how the 15/18x UHD vortex compares but it’s probably enough more $$ to make the meopta the way to go.