Horsefaced loaches can get big if you put them in a big tank, and it's almost a requirement that they have a sandy substrate. (they dig, and burrow in it.) They should leave the shrimp alone.
Most botia loaches are nocturnal hunters, and love to eat snails. IMHO, any botia has the possibility to take down your shrimp, and once he finds that he *can* do it, they will continue to do it.
That being said, both will get along fine with corys.
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