First best of wishes,
It looks really good, clean images etc.
I like your personal opinion- people actually like it.
I think the selection is about to confusing , weather to make the difference bolder ( for example explain the difference under the image) or thin out a bit - but only you know what to guess.
Best tip that worth gold is to use the wording that your customers may use and not the one from your suppliers. That may help you rank to these terms on google.!
Use for that google keywords tool or other keywords tool or ask people how would they describe it.
( we may think that we know how and find out that 30% of population call it by other name)