On Glass.
I have had some time behind a Razor 4.5-27 I have a Coronus 4-29 that I've had only for a short time. In broad strokes I see them as the same optically. You know when your looking at a black and white target at 50 yards some scopes you can never quite seem to get the image in focus? That is how the Razor and Coronus are. At 100 yards you wont think of it. What I have found with scopes like this if you look at optical charts one with blue, Green, and Red you will need to set the parallax different to focus Red then to focus green and blue. You can have two scope with the same resolution but one focuses all of the colors on the same plane it will have more detail and better contrast.
The LR focuses all colors on the same plane and has better resolution as well. The brown critter in the fence line by the brown stump behind the grass in the shade... will pop out better with the LR simply because the micro contrast is better.
I would say that the LR needs a sunshade sooner then the Razor/ Coronus to control the flare when the sun is low and in your eyes.
Turrets
You have to spin turrets 100 times before judging them.
The LR turns easier then both the Razor and Coronus. The Coronus turn far to hard for my liking as I want to be able to quickly spin it with 2 fingers. I find I need three fingers on the Coronus. The Razor works with 2 fingers but has less distinct clicks the the others. The LR has very distinct click that I find easy to feel. If you like very snappy click the Coronus has that.
With the LR the second turn indicator will enter the discussion. I absolutely hate it!
With 22lr I'm often running just into it. But it is very manageable after you have spun through it a 200 times. 15 mil per turn I absofeaking love its worth the second turn indicator to have!
Tracking
The LR tracked consistent for the whole range. I came up with 98% (in my books acceptable) but will be double checking once I have time.
Anyhow that is some of my observations. I'm not saying the Razor is not good. Or the coronus for that matter. They are solid options and will beat the LR on a couple points but not better then the LR on average.