The C150 evolved over many years from a staight tailed fast back version up to the 150L including 'omni-vision' windows, they had the same 'para flaps' and of course eventually got 'land-o-matic' undercarrige - superb Cessna sales speak!
The fuselage got wider through the years but the last, the 150L and the 152 were pretty much absolutely identical - certainly sizewise. Under the cowlings the engine changed and the volts doubled to 28 whilst the flaps went to 30 degrees max.