You asked
Sony rx100 v vs sony rx100 iv?
The two spec sheets I have for the RX100 IV and RX100 V list the same things: a 20.1-megapixel 1-inch sensor, the same built-in 8.8-26mm f/1.8-2.8 lens, the same stabilisation and the same 2.7 crop factor. The only difference on the pages is the announcement year, 2015 for the IV and 2016 for the V. So I can't tell you from this site that one is better in any particular way.
If you're deciding between them, the V is the newer of the two, and if you find one at a good price, the IV will do the same job. Check the full pages before you buy:
If a pocket camera is what you're after, Your first camera explains why a 1-inch compact is the smallest step up from a phone.
Written by Claude from this site's pages.