Partner Gaming is Linesmaker, a Sportingbet owned Sportsbook
Ehorse is a themed sportsbook, they also have a car racing themed sportsbook
Those places are nowhere near the quality of the track sponsored horsebooks, first of all they cap their odds, which is truly pathetic, as if the odds weren’t already stacked enough against players, and secondly, they don’t offer the free live video coverage, free forms, etc, offered by the track sponsored horsebooks
All the marketing in the world ain’t gonna make them a better product
Since you’re looking at those, you might as well just go with a top sportsbook that offers a good horseracing product, a lot of these “racebooks only” are crap to be honest, besides the track sponsored ones i listed
These places, tcbets, otbusa, racebook, etc, all crap, believe me, and i forget the others now, many are owned by Sportingbet