Yes and no.
Banana, and any of the other T+ type albinos, are all different forms of hypomelanism. Which is to say, they all produce melanin to some extent or other but it is either at a reduced quantity, deposition, or display (finer points not needed for this conversation). So in that respect, they are the same
How they differ comes down to… Call it presentation. In my explanation for Pastel, I likened the melanin to being like a lacy doilie. Let me see if I can sort of redirect that analogy in a way that makes sense…
Instead of a doilie, instead imagine a fishnet stocking with holes about the size of a dime. Take that stocking and dye only the top portion of it with black ink. Pull that stocking over your leg. Take some scissors and, along the length of your leg on the sides, cut a few holes. Now… Get another stocking and repeat the process, cutting the holes on the new one to match the holes on the one beneath. Do that again. And again. And one last time but for this one, do NOT cut any holes.
Right about now you are probably asking “Why has Travis made me do this to myself” right?
Well, congratulations, your leg now looks like a ball python (sort of).
So how is this relevant to Pastel versus Banana?
With Pastel, the mutation changes the “size” of the holes in the fishnets, instead of being dime-sized they are now quarter-sized. This does not make a huge difference on the areas where there is no pattern cut because the overlapping layers do not line up perfectly so you stay looking mostly black there with occasional spots where the overlap is perfect and you get lighter areas. But on that last outer stocking, the larger holes means that the flesh colour of your leg is less obscured/more visible. And, by extension if the holes in the netting are half-dollar-sized (SuperPastel) this results in less overlapping and more light areas in the non-pattern areas and even higher visibility of the flesh in the cut-out areas
Banana (and the other T+ types) is different. With these, the mutation effects the step where you are taking dye and dying the top half of the stocking. In these cases, the dye has been watered down. So instead of being black, the dyed areas are some shade or other of light grey.
In both situations there is less melanin being presented, but the cause for each is different.
Also, you can go take off the fishnets now (or not, I do not judge LOL)
The spotting in Bananas is something specific to the mutation. For some reason or another, the melanin is being turned back on in small areas. There area a few ways this could happen and I have a suspicion as to what it probably is but I am hesitant to speak it aloud and have someone think I am claiming the idea as being ABSOLUTELY THE WAY IT IS and then spreading it all over FB and the like.