The Gladiator is built for teenagers, adults, beginners and intermediate players who don't mind not having counterbalanced men. It's a solid table that will withstand vigorous play. The rods and surface create fast play that intermediate players will enjoy. Another table to consider in this price range is the Carrom Signature, which has counterbalanced men and a 1-year warranty.
The Pro Force is designed for children, teenagers, and beginners. It's a quality table for the price, but not one that I would trust to last a lifetime. It's great for those who just play casually every so often. Those who are serious players will want something heavier. For less than $300, this is a table I would strongly consider.
The Atomic Euro Star is mainly for beginners, but is still playable for intermediate players because it’s full-sized and has good weight to it. Though, it might wobble a little if play is aggressive. All age groups can play with it, though it might be a little tall for some children.