As others have stated, Color Plus is Kodacolor VR 200, or something very similar. All Kodak colour negative consumer films in the last 40 years or so have tended towards the red/orange - at least compared to Fuji. I like Color Plus, but then I liked VR and never really liked Gold because I find it too saturated and too red/brown. With Color Plus, a cloudy, dull day looks cloudy and dull. Gold can lift it to look brighter...if you like that sort of thing. Here in the UK Color Plus is a *lot* cheaper than Gold 200. Ultramax 400 is int the same lineage as Gold 200 but has had the reds tweaked a bit to make European skin tones look better. Therefore it's not too far from capturing natural colours. Fuji Superia is probably the finest grained of the lot and doesn't have the sensitivity to red/orange but is probably a little skewed towards greens. Great for landscapes. Great for portraits. Not so great for racing cars, people wearing bright clothes if you want your colours to "pop".
Kodak Pro-Image is interesting....I've shot two rolls at box speed and found that worked but CN film is very tolerant of over-exposure. I found the colours pleasing in the British summer, not subdued but not as overblown as I find Gold. I was shooting the countryside, flowers and horses rather than people. Grain is greater than one would expect of a 100ISO film but not intrusive.
