Whereas Space Ranger had his anti-gravity gun, numbing gun, thermo-blaze gun, explosi-discs, and dissolverizer as part of his arsenal... Napier both with the Trust and later as the Conqueror had a host of futuristic weaponry at his disposal. Using his vessel the Solar King to journey to his secret base in an asteroid between Mars-One and Jupiter-Two, Space Ranger his in an ideal vantage point to survey all that may transpire within his solar system. Similarly, utilizing a gravity drive driven space ship to travel to Jupiter-Two, the Conqueror was able to terrorize both Jupiter-Two and Mars-Two under the direction of the Green Head known as Bakeelu.
The Ranger would have a long and distinguished career albeit not yet but in a potential future timeline. The Conqueror would only twice surface, once as Napier to plague the All-Star Squadron when his Brain Trust and their futuristic eye-shaped spaceship were hijacked by Anton Hastor, then later to battle the Justice Society of America as the Conqueror. His career as a scientist and friend of the heroes was distinguished, his costumed career, not so much. Both met the a Green Lantern of their Earths during defining moments of their lives, which would ultimately set them on the right course.
And as for the counterparts of Space Ranger's ally Cryll and girlfriend Myra Mason, who aided him throughout their career, these were allies of another caped crusader.The counterparts of Cryll and Myra Mason were the owl known as Hooty and Myra Mason. While Cryll was an intelligent shape-shifting creature from another world, Hooty was an intelligent owl of Earth-Two who aided Doctor Mid-Nite. And Mid-Nite had the beautiful Myra Mason who loyally supported both of his identities as had her identical twin on Earth-One, although the future Myra knew that Rick was Space Ranger while the original Myra never connected the dots between Doctors McNider and Mid-Nite... despite their multiple cases together. Nevertheless, both lasses were fine personal assistants to the pair throughout their careers and carried a torch for them.