Winsor & Newton Professional Acrylic has certain attractive properties and is much similar to oil paint. If what they claim is correct, then acrylics is winning the contest between oils and acrylics, because it seems that the latter is simply the most archival choice. Most old oil paintings have developed craquelure, as one can see when visiting a museum.
"These are our very finest acrylic paints--they're made with the latest developments in resin technology. Most acrylics darken as they dry, but our clever, translucent binder means that what you see is what you get. With no colour-shift, colour-matching is made much easier. We've also made sure these paints have a longer working time without compromising the famous acrylic fast-drying time. And, with 80 brilliant colours, you're spoiled for choice." (here
They claim that, depending on the thickness of the paint, the working time is approximately 20-30 minutes. It also retains brushstrokes. (here
I have tested a tube of Azo Medium Yellow. Indeed, when dried, it looked the same as when laid out on the canvas. The brushstrokes are retained, but not in the same measure as oils. Of course, when acrylics dries it also shrinks, so it cannot have the same pronounced effect. However, it is virtually impossible to differ between this paint and oil paint.