What are the differences between CS 1.6 and CS:GO? A simple bullet point comparison similar to What are the differences between CS 1.6 and CS:S? would be nice.
First of all, there are many differences attributed between CS1.6 and CS:GO. The most important thing to note is the engine; it's improved dramatically over the past 9 years (CS1.6 was released in 2003, CS:GO in 2012). Namely, CS1.6 uses the GoldSrc engine, which is a heavily modified Quake engine, and CS:Go uses the Source engine.
Second, CS:GO features drastically balanced gamemodes and weapons. Most notably, they completely changed the way Hostage missions worked previously in CS:S and CS1.6, and made it a lot more balanced for both sides. Some new weapons were added, and most of other weapons got a huge balance update (default pistols get a buff that puts them up to standard to other pistols, deagle nerfed).
Along with that, CS:GO also features a matchmaking system extremely similar to that of TF2, but it forms games based on a "combat rank", which helps to put similar players of similar skills in the same games.
Some other features are a complete UI revitalization, a more informative and easy to use buy menu, and an extremely polished user-friendly tutorial. Some minor things are the removal of flashlights (some servers have it with plugins), removal of silencer/silenced weapons (TMP (now known as the MP9), M4A1, and the USP (now the P200), as well as getting rid of pre-defined loadouts.