I want to stress the pattern is very different than my zebra loach
none of my 10 zebra have white on the bottom; but it could also be stress marks.
I'd wait for someone else to respond before rushing off to buy more.
I will say they are delightful fishes though at times they will hide a bit but they are quite a bit quieter than many other loaches and very peaceful.
Either way, both species are
not boisterous or aggressive. A mixed group should pose no compatibility problems.