Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the Sony TX30 and YI M1 side-by-side from the front, back and top in their relative dimensions. Sony TX30 has external dimensions of and weighs 141 g (including batteries). YI M1 has external dimensions of 114 x 64 x 34 mm (4.49 x 2.52 x 1.34″) and weighs 350 (including batteries).
Below you can see the front-view size comparison of the Sony TX30 and the YI M1. Sony TX30 is clearly the smaller of the two cameras. Its body is 18mm narrower, 5mm shorter and 19mm thinner than YI M1. As you can tell, actually this is not a fair size comparison since Sony TX30 has a built-in lens but YI M1 doesn't. Once you put a lens on M1, its thickness will increase significantly.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
YI M1 is 141g lighter than the Sony TX30 but we don't think this will make a significant difference.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on M1, the total kit will weigh much higher.
Weather Sealing
With its weather-sealed body, we believe that the TX30 has a big advantage over the M1 which doesn't provide any kind of environmental sealing.
LCD Screen Size and Features
Sony TX30's 3.30" LCD screen is slightly larger than YI M1's 3 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.