I have some Mike Lucas bore guides and recently acquired a couple of the bore-techs.
While the Mike Lucas guides are usually pretty good, I have a few different cartridges and rifles, and I didn't want to keep attaining dedicated bore guides for each new cartridge. In my limited use so far, the Bore-Tech's seem to do everything that a Lucas does. With my Bore-Tech bore guides, I need only 3 bore guides, versus the 5 dedicated Lucas guides I would otherwise need.
I like to keep things simple, and the Bore-Techs seem to do a good job of that. Either way (Bore-Tech vs Lucas), you'll get a good bore guide.