Differences in design philosophy really.
Both Cessna and Piper fit wing tanks on both sides. Cessna (at least for the 150/152) then connect them to each other, have a single feed out of them, and treat the whole thing as a single tank.
Piper treat them as separate tanks, with a selector between them, one setting on the selector being off.
An alternative method you see on some high wing aeroplanes, is to have two tanks in the wings, feeding simultaneously a header tank behind the seats, and then feeding the engine from that. The homebuilt EasyRaider works that way.
I'm firmly of the view that a fuel system, so far as is reasonably possible, should be designed to give a single gauge and a simple on-off valve. Everything else should be down to plumbing and / or automation. Complications belong in the drawing office where we have all the time in the world to get it right, not in the cockpit, where we don't.
There is a further approach, which is used on US aircraft and UK military aircraft, but is banned on UK/European civil aircraft. That is with two tanks to have a L-R-Both selector. The reason it's not accepted in the UK, is that it will invariably drain one tank first, then suck air from that tank and cause an engine failure with stacks of fuel still on board.
There was also a 1960s Cessna with the fuel selector labelled "Left / Right / Both OFF". You guessed it, the OFF was right at the bottom and tended to get rubbed off by the pilots knee. Apparently quite a few pilots who didn't know the type well would select "Both", and cause an engine failure through fuel starvation.
G