I think these look smarter than the compression (exposed threads)…having a smooth finish ideal for exposed pipe work. It’s push fit but supposed to be non demountable, not needed to try that as installed fine first time with no leaks…(low pressure system)
Couldn’t get any chrome end-feed or Yorkshire fittings so went for these. They look smart and are easy to fit. Used them on Chrome pipe. If you buy the Pegler Debur / Scribe tool you don’t have to remove the chrome off the pipe, which makes life much easier. These are “fit once” though, so you need to get it right first time!