They are not as wide a beam as the other new LEDs which have a stronger diffusion in their packaging. Most blue LEDs have a greater green component, and are consequently more of an aqua colour, but these particular LEDs are a pure and beautiful blue, with a touch of violet. For purely functional purposes, such as making sure the LEDs are visible at wide angles in intense light, both the new Red and Deep Blue LEDs would be ideal. The other three colours are still a big improvement in brightness on the original LEDs, but the new Red and Deep Blue are brighter still. You can have a combination of colours if you really want.
Pricing is all the same.
Although the other colour LEDs are less expensive than the Deep Blue LEDs which I have been installing for some time now, I anticipate that the new colours will not be installed as often, and I have had to go to a lot of trouble to sort through the dozens of options to find the best ones and to document it like this. This is for technicians who are interested in installing LEDs in the TB-303 and other items of equipment. I do not recommend that this be undertaken by inexperienced people. Desoldering LEDs is non-trivial. I have a special technique which is hard to explain, but which is still a fiddle.