I wanted to do a quick swatch comparison for myself of some of these new toys. The new Pops of Color from scrapbook.com have the thickest tip, and the thickest liquid. The dots are not self leveling so you if you leave them pointed, they dry that way. It is a nice shimmering paint that dilutes with water well too!
Opening these is more complicated as well -- there's a stopper in the tip, but it also means you can unscrew the tip so if these clog they will be easier to remedy later.
The Ranger Liquid Pearls has the cleanest and thinnest tip for writing, smoothest liquid of the opaque types. (the grey L) The two Nuvo types, have the medium sized tip of the three -- the Crystal is opaque and slightly more self leveling than the Ranger. The Jewel is very self leveling, but it also means your writing or drawing widens out as it dries. The translucent nature of it still makes it very versatile though!
I did test out a 2nd color of each and didn't find any difference in behavior from these examples in the photograph. Some pigments can make products behave slightly differently between colors but I haven't seen it yet in these products.
I recommend all four types for different uses -- so have fun embellishing your projects with each! And when you eventually smudge it while wet -- have no fear -- you can wipe it as flat as possible, allow to dry. Then cover with a different embellishment or my favorite is a scrap of washi tape that matches the project. Then you can add your dots on top again.
I don't have affiliate links at this time but you should be able to find all these and more between scrapbook.com, Acherryontop.com, Whiterosecraftsllc.com, and notjustforboyskitclub.com!
Happy crafting to you all!