Ryan
Funnily enough I have always seen the Starlight as hoovers Tol cleaner of the period and the ranger as a bit of a fill in to patch the range up although I have no idea why they just didnt get rid of it for something more modern.
Perhaps it was better the devil you know.
The Starlight feels much nicer to use with a comfier handle grip, the push force spread out over a wider area than the senior which makes for less wrist work.
Not to mention the bag box, better suction from the relatively sealed tools system, floor height dial, smaller cleaning path to aid getting in and under dining chairs etc, flat longer lasting belt.
Allround better features bar the bag capacity which I dont feel is much of an issue anyway.
The floor height dial could be argued but I have never been able to master adjusting the seniors lever with a foot and usually end up bending down to adjust it anyway. Much easier with a dial.