The Sony Alpha 3500 features 20.1MP Exmor™ APS HD CMOS Sensor and BIONZ Image processor on the other hand Sony Alpha A5000 features 20.1 Mp Exmor APS HD APS-C CMOS Sensor and BIONZ X Image Processor, take a look at the Major Specification Below.
Sony Alpha 3500 vs. Sony Alpha A5000 Specification Comparison Table.
Bigger Sensor Size: Sony Alpha 3500 have bit bigger sensor than Sony Alpha A5000.
The large sensor captures more light hence the result is lower apparent noise, more color depth in image and increased dynamic range.
Hence you will get better image quality with Sony Alpha 3500 when compared to Sony Alpha A5000.
Image processor: Sony Alpha A5000 image processor is advance compared to Sony Alpha 3500,
The image processor is responsible for overall operational speed of a camera. A better image processor will give you fast AF speed, less shot to shot interval time and less start-up time, the image processor also decodes RAW file to JPEG format, a advance image processor will give you better output compared to older one.
Battery Life (CIPA): Sony Alpha 3500 battery rating is 470 shots and other hand Sony Alpha 5000 420 shots. According to CIPA.
Dimensions: Sony Alpha A5000 is smaller than Sony Alpha 3500.
Weight: Sony Alpha A5000 lighter than Sony Alpha 3500.