Justapax1
Most of my flying is now in Business Class with our 3 carriers EK,LH,SQ with occasional BA and loco carriers like Jet 2, Easyjet, Ryanair. I have only travelled First Class a very few times and this has been a result of an unsolicited upgrade, and that has been with EK/SQ and BA for some reason or other. As an observation the difference's are quite small especially on EK / SQ with it being more about the quality of lounge and food and wine on board as well as space.
As an example on EK the Champagne in the bar is Veuve Clicquot and in First it is Dom Perignon though I prefer being able to walk and stand at the bar and chat rather than sit so I have on the times I have been upgraded with EK walked to the bar. I am not alone in this, as on my last EK flight the other week a gentleman came down from First to chat at the bar with CC crew bringing a bottle of Dom. I happily chatted with him while he drank his Dom but CC were obviously instructed not to serve other people with his champagne, though he did offer me a glass which I was allowed to accept.
Any comparisons between Business and economy are meaningless as there is no comparison, though it is an expensive perk or indeed cost, if it is for a holiday. First to Business I would not personally pay for as I do not think the difference is that great on any of the carrier's I use anyway.
Cheers
Mr Mac