The quality of melons is inconsistent. That's my first observation.
Melons grown in your home state usually taste better than "imported" melons.
Seeded watermelons are consistently sweeter than seedless varieties.
What Exactly Is a Seedless Watermelon
It's a sterile hybrid of a traditional watermelon. That means it can't produce mature, aka fertile, black seeds. So any seeds you find in a seedless variety are only immature hollow shells--these are the small white seeds you see in these watermelons.
Seedless watermelons aren't GMO, but they're chemically modified to create a melon with 33 chromosomes instead of 44. Hmmm. That's seems GMO to me, but by strictest definition I guess it's not.
Which Is Better
Getting back to the seeded versus seedless question, the old-fashioned seeded variety always beats out the seedless when I've bought them. The seeded variety is pinker to brilliant red, juicy, and have a texture that's toothsome.
The seedless ones I've always had aren't nearly as juicy and they're often either mushy or too firm.
If you consistently have had seedless melons that are superior to a seeded one, tell me about it in comments. I'd be interested to know the grower and geographic location. (That's usually on a sticker on the melon.)
Have a wonderful weekend--seeded or seedless!