Serious Matchmaking vs. Variety
eHarmony is best known for its serious matchmaking and long-lasting relationships1. It uses a scientific matching system, which is a boon for those seeking meaningful connections. On the other hand, Match offers a wider variety of singles, which might be more appealing if you enjoy browsing through profiles and don't mind doing some of the legwork yourself.
User Base and Gender Ratio
eHarmony boasts a user base of 10 million, with a gender ratio of 55% female to 45% male. This balanced ratio increases the chances of finding a match. Match, however, has a larger user base, which means more profiles to browse through but also more competition2.