Actually samsungs latest browser is just as good as safari and maybe better in some ways. I own both a large ipad pro, galaxy s6 edge plus with marshmallow, and a galaxy tab s2 and there is nothing lacking in the Samsung browser in comparison to safari. Both are equally good but I would give rendering heavy websites with many graphics a definite advantage for the Samsung browser.
The advantage that android devices have over ipads as being a laptop replacement is mouse support and a file system. The main weakness is the app market but that's not too much of a problem on the 4:3 tab S2.