Kodai Ouja Kyouryuu King: Yokuryuu Densetsu

Both have time travel, cards & battles. Both have cute monster designs as well more serious/cool looking monsters. Both have good English dubs. 

Both second season follow ups of very similar niche monster battling kids anime. Both have intelligent creatures based on real world animals (spiders in spider riders, dinosaurs in dinosaur king). In both a young cast of heroes communicate with, tame and battle alongside these creatures. Both also have comical team rocket style villains as is common for shows targeting this demographic, it is clear these shows are targeting the same audience. 

Both more niche alternatives to Digimon/Pokemon style shows. Both have young heroes, monster battling & intelligent creatures who communicate with their human partners. 

Both feature prehistoric influences, time travel & monster companions. Both have similar age protagonists. Both have cute monster designs that can change form to become more ferocious and formidable. Both shows include the main kids parents as important characters. 

Both second seasons of classic monster battling kids anime. Both have intelligent monster companions who communicate with each series' human child counterparts. Both have similar style humour. 

Both kids anime with very similar tones and content. Both targeting the same audience and made alongside products/toys to sell to their audience. Beyblade Metal Fusion tried to sell their real world counterpart beyblade toys whereas Dinosaur King tried to sell it's short lived card game as well as other various toys. 

Both kids anime that prominently feature futuristic tech; time travel, AI, VR, high tech vehicles etc. etc. Both also have a variety of monsters with great designs as well as cool character designs. 

Both are the second series of monster battling kids anime. Both maintain the charm of their original seasons while still exploring new grounds (but playing it safe and not shaking things up too far). Both shows have good humour as well good back-and-forth's and dialogue between the monsters and human characters. 

Children's anime that focus largely on kids battling against at first unforeseen dark powers. In both they battle alongside companion creatures (in beyblade it's slightly more convoluted with these companions inhabiting beys). Both also were used as marketing for real life toy and game products. Max and Gingka have their similarities with many of the typical child protagonist traits of the time. 

Both have time travel, monsters & card battles. The main villains of both anime are also time travellers. Both have monster spirits sealed within cards. 

Both the second series in iconic children's monster battling anime. Both focus on a young group of friends who possess special objects that contain within them spirits of powerful monster companions. 

Both the last seasons of iconic monster battling kids anime with their respective monsters trapped in inanimate objects such a cards/beys. Both have similar aged heroes and similarly varied monster designs. 

Both classic kids anime series which have monster companions to our series main heroes. Both have wide variety of monster designs with the main focus of both shows being the monster battles. 

Both classic kids monster battling anime. Both have friendship as major themes. Both have young children heroes who befriend monster companions and battle villains.  

Both the second series of popular kids anime that centre around card games and monsters. Both feature spirits of sentient monsters sealed within cards. Both have good art styles and target almost the exact same audience. Yu-Gi-Oh can be more mature in my opinion with Dinosaur King often playing it safe to remain as kid friendly as possible, however I've seen both series enjoyed by both younger and older audiences. If you're into one of these anime I feel you are likely to get a kick out of the other. 

Both feature card games, children protagonists and the characters of the show have monsters that they control. They are targeted to the same demographic and contain similar themes and appeal. 

Both iconic kids monster battling anime that have major themes of friendship, companionship and courage. Tamers is more mature but the premise of both shows is very similar.  

Both classic monster battling kids anime that see humans fight alongside their series respective intelligent creatures (Digimon & Dinosaurs). Both have similar aged protagonists, similar style humour and similar premises & themes. 

Both shows focus on their heroes relationships with their monster friends who bring them to strange new worlds and experiences. Both have great character and monster designs. 

Both second seasons of classic kids anime. Both have monster companions. Both have young children main characters.  

Both are classic monster collecting kids anime series, both have intelligent creatures who communicate with main human heroes of each respective series. Both have great English soundtracks. 

Both children's shows featuring a quirky cast of young characters who battle with objects their monster companions inhabit. Both have strong themes of friendship and doing the right thing.