Ektar has colours that "pop" like probably no other film in the history of colour negative films. Try photographing flower gardens, colourful animals, and suchlike with Ektar and you may understand why it is special.
Never tried the old Agfa Ultra 50, did you?
I swear I think it was more saturated than Velvia. It made Ektar look pastel. Well, not quite, but it was considerably more saturated than Ektar, and way less accurate which mattered not at all for many subjects it suited and made it unusable for others. It wasn't accurate but it was sure saturated. Not good for people as a rule, but I liked it for certain things (shot a bicycle race with it and it made the jerseys and bikes just explode with color.)
I love Ektar BTW. I'd love to have a 400 speed version of it but these days I'm just happy it exists at all.
I also just noticed that I'd read the date but not the year on the posts I responded to. Well, that really doesn't change anything except, sigh, the prices.