How about the combination of SLR (35mm title) and card (RX 100M3) for overseas travel?

It depends on whether you are mainly traveling or taking pictures. One has one's hobbies and habits. I only say my own opinion for your reference.

Travel itinerary: If you go directly to a country or region (for example, the United States) and come back directly in a few days, then you can barely go out by plane. If you travel in five European countries, I don't recommend you to go out by double plane. Most of these trips are arranged very tightly, and a lot of time is spent on the journey, so it is difficult to ensure the time and energy for taking pictures. Travel+accommodation+sightseeing are quite tiring. Although I have never been abroad, my travel experience is that you can go into battle lightly, and the simplest is the simplest. Two machines take up a lot of space and need to be used back and forth. I have a headache when I think about it, and they all say that "the burden is not light when traveling." The old saying is quite reasonable.

Equipment selection. If you want to take travel photos while traveling, obviously Sony RX 100 M3 (hereinafter referred to as Black Card III) is enough for you. I have only used black cards in the black card series, which is quite shocking. The card machine was enough to go this far, but it was finally given up because of the price. As a travel machine, the black card series has great advantages, strong portability and good image quality, and SLR is a headache in travel.

You choose the matching of equipment because you think so. Take most photos with a large zoom of a black card, and then take close-ups with a SLR +35mm lens. Although this idea is comprehensive, it is not a good choice for long-distance travel. It's really frustrating. You can't do it without omission. Traveling, the most important thing is to see, let yourself experience more exotic customs, taking photos is actually not important, and the commemorative significance is greater than taking beautiful photos.