Sounds like they're probably GSF. Bluegill do have a much more rounded shape, and also have a much smaller mouth; GSF have a mouth closer to a LMB in size, and their bodyshape more resembles that of a LMB than it does a bluegill.
Go with coppernose bluegill in the small pond. They grow very fast in your area, and as long as you keep 30 or 40 adult bass in there at all times to keep them thinned out, you should get some huge ones if you fertilize and/or feed. As a trophy bluegill pond, you want it to be bass-heavy so they keep the bluegill numbers from getting high; the bluegill that survive the year-one gauntlet after birth will have all the food they can eat and will get very large. You could stock hybrid bluegill but only the first generation gets large, and you'd have to re-stock pretty regularly to keep good-sized fish in there, whereas the CNBG would provide a population of large 'gills year in and year out as long as you keep plenty of bass and food in there.
If you haven't already put the GSF in the small pond, and you want it to be a trophy bluegill pond, I wouldn't put them in there. They're a very unpredictable fish, they eat most of the same foods as bluegill, and they can easily spring back to prominence even in a pond they've been scarce in in the past; such is the case with a five-acre pond I'm working with right now in which they used to be rare but are now becoming very common. I've caught more than one every time I've fished it recently, whereas I used to seldom catch them. And that pond has a large population of LMB, as well as a very established population of big bluegill, and on top of that about thirty CC in the five- to twenty-pound range. The GSF will prey on your young bass in the pond, making the bass population more uncertain, and they'll compete with the CNBG for food. There's a reason that most hatcheries don't sell them.
And for what it's worth, it hasn't been my experience that simply having bluegill in a pond is the death knell for GSF; quite the contrary. I've seen more than one pond that had bluegill, in which the GSF completely overran the pond and almost eliminated said bluegill. There's a thread that was posted on here either today or yesterday from a pond owner who had the same experience.
