Which version of Opera to use....

Hi,

I am editing various js topics and comparing support in various browsers.

caniuse.com lists the follow browser vendors.
      IE Firefox Chrome Safari Opera iOS Safari Opera Mini Android Browser Blackberry Browser IE Mobile 



However Opera has a Presto and a Webkit versions. 


About Opera
Version information
Version 12.17 
Build 1863 
Platform Win32 
System Windows 7 
Browser identification

Opera/9.80 (Windows NT 6.1; WOW64) Presto/2.12.388 Version/12.17

Opera Next 19.0
Made to discover

Version information
      Version: 19.0.1326.45 - Downloading update 44% 
      Update stream: Next 
      System: Windows 7 64-bit (WoW64) 

Browser identification
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.76 Safari/537.36 OPR/19.0.1326.45 (Edition Next)


It appears to me that Opera Next should be used for browser comparison, on the assumption that the Presto engine is being phased out.

the latest Presto engine release also recognizes webkit prefixed CSSDOM properties and webkit methods, but comparison between the two versions of ‘Opera’ are worlds apart.

Regards and Greetings from Australia.