I'm going to be buying a new scope and have been looking closely at the IOR line, but am confused about these two models. Why is the 3-18x42 more $ ($1549)than the 6-24x50 ($1459)? They are both SFP and are similar near as I can tell. The 3-18x42 might have a bit more adjustment, but other than that what is the difference? Logic would have that the higher magnification would cost more? Someone explained to me the 3-18 was made better, but didn't get into details. Is that the case? Thanks for any info either way.