I've only played High-beams fra DR and have been happy with both playing comfort and tonal balance on these. Here's how DR String self explains the differences between the models. I doubt the advantages with the most expencive models justifies the higher price. It's better to choose strings at a modest price and replace them as often as you can afford!
Olav
"HI-BEAMS are the string to choose for brightness, and ease of playing."
"Lo-Rider stainless steel bass strings are round wound and constructed upon a hexagonal core. They provide more depth of tone,
and are a bit stiffer than Hi-Beams."
"Lo-Rider nickel-plated bass strings are based upon hexagonal cores, wound with nickel-plated steel, specifically designed for a
softer feel and a traditional warm nickel sound."
"Sunbeams feature the easily recognizable feel and flexibility of DR round core Construction, with nickel warmth, softness of feel, and increased response to magnetic pickups due to the sensitive magnetic
content (compared to stainless steel) of the nickel plated wrap wire."