are these two colors a preference or are they a big difference in color selection?

I'm not exactly sure what you are asking, but those two colors are what you would call the basic colors. They will work anywhere in the country at one time or another and are very effective at times. It all depends on what the fish want.

i should of expanded. when choosing a color for soft plastics does green pumkin make a difference for lmb ? Right now i stick with black/blue and grren pumkin. I was just wondering if i should be expanding my color selection?

My go to plastics are tubes and creature baits and both green pumpkin and watermelon are two of my go to colors. The majority of the time, I try to match the surroundings as closely as possible so I chose between these two colors depending on the conditions I'm given. Hope this helps!

Green pumkin and watermelon work about the same.I throw green pumkin mostly.

these two colors are my favorite. if i had to choose i would take green pumpkin everytime over watermelon seed. it honestly has produced better than watermelon seed.

Most of my buddies throw green pumpkin and do very well; I throw watermelon/neon and have never catch a single bass on green pumpkin.

This is just my opinion........other than both colors beeing a shade of green, they are totaly different. First, watermelon is slightly translucent, making it a better choice in shallow clear water, and thats where I fish that color. Green pumpkin is a solid, darker color. I like it under docks, mats of weeds, lillypads, and out on the deep weed edge where visability/water clarity is lower. Now if the water is stained up shallow, I will use green pumpkin insted of watermelon, and then go even darker, like black, junebug, red shad where Iwould normaly use green pumpkin. These are not set in stone rules I have, I always experiment a little, some days differnt things work where I wouldn't expect them too.

This is just my opinion........other than both colors beeing a shade of green, they are totaly different. First, watermelon is slightly translucent, making it a better choice in shallow clear water, and thats where I fish that color. Green pumpkin is a solid, darker color. I like it under docks, mats of weeds, lillypads, and out on the deep weed edge where visability/water clarity is lower. Now if the water is stained up shallow, I will use green pumpkin insted of watermelon, and then go even darker, like black, junebug, red shad where Iwould normaly use green pumpkin. These are not set in stone rules I have, I always experiment a little, some days differnt things work where I wouldn't expect them too.

amen to that

There are times that I use watermelon and can't get a hit switch to pumpkin and the bass start hitting. So I believe that color does matter.

What ww2farmer said x3.

Kelley

Those are two of my favorites in brighter water. I start by looking at the water color. If the water has a green tint I throw a Watermelon pepper(or red flake) and if it is stained with a brownish tint I start with a Pumpkin pepper. Of course you will have to zero in on exactly how the bass want it presented such as vertical, horizontal, fast, dead sticking, or twitched.

In dark water whether dusk, nite, or just dirty water I will start with black/blue. If it is that dark though I will go to a noisy bait like a spinnerbait or crankbait.

There are times when color is important, even critical. That is an absolute fact that I cannot explain.

However, MOST OF THE TIME, "dark" works, especially with soft plastics. Well, and then there are those times it has to be white or white with chartreuse...

Green pumpkin and watermelon are both consistant producers.

For SMB..I prefer Watermelon on bright sunny days in clear water

Green pumpkin on party to mostly cloudy days in clear water

I like watermelon in shallow water, clear water, or under sunny skies.  I use green pumpkin in deep water, stained - murky water, or when its overcast.

I agree with WW2FARMER.

On top of that you shoul give an onest try to some kind of purple-ish bait (Junebug, tequila sunrise, etc). The colour purple travels the deepest through the water column so it is the most visible to mr. fish. For dark/ steined water or low visibility conditions try black( or solid dark colours)