You asked
Sony rx100 vs sony rx10?
The RX100 is the pocket one. Its 10-37mm lens frames like 28-100mm on full frame, and at f/1.8-4.9 it's the easier choice if you want something you'll actually carry everywhere. It was announced in 2012.
The RX10 is a bridge camera. Its constant f/2.8 lens frames like 24-198mm on full frame, so you get more reach and a steady aperture across the whole zoom. It was announced in 2013.
If you want a pocket camera, go with the Sony RX100. If you want one lens that covers wide to distant, the Sony RX10 is the better pick. For something newer in that bridge style, see the Sony RX10 IV.
Written by Claude from this site's pages.