Apollo bikes were made by Kuwahara and cover the gamut from entry level bikes (like the Sport 10) to high end road bikes and touring bikes that used high quality tube sets and top of the line groupos.

I have seen some 80's models that were equipped with Dura Ace / Crane groups that are exceptionally nice bikes.

When Kuwahara branched off into making mountain bikes they retained the Apollo badge for a little while and once they became established the Apollo name was dropped from their mtb's and they started marketing mountain bikes and road bikes under the Kuwahara name.

The Sport 10 is an entry level model that will have a straight gauge frame, steel wheels, and entry level components and might be compared to the Miyata 100 which is slightly better but not by much.