Hi!
Personally, I would go for Vueling Excellence without even thinking about it! It's nice as it includes the little extras your PAX would be used to as biz/first aficionado, such as lounge access, fast track & co depending on airport, and the food and drinks on board, and middle seat free...without speaking of the full flexibility/ref which is great! (oh and 14kg hand luggage allowance which is nice too!!)