True, my annuums are quite a bit leggier, but far from massive. My Aji Limon plants are turning into beasts. They are as bushy as the Chinese and as tall as the annuums.
The ones in the pics, without going out and checking, should be a Caribbean Red or Red Savina and a Fatalii.
Definitely not a pot size issue yet. They are in 10" pots right now, so they have plenty of room left to grow before moving up to 15-20" pots. They have been getting Fish Emulsion every other week and some Epsom salt sprayed on them on off weeks. I have thought about trimming a few of the bigger leaves to get more light to the inner leaves, but pruning has always freaked me out, even though I know it shouldn't. I about cried the first time I topped a plant.
So far all have been putting out flowers, but I have been picking them off so they can have some extra veg time.
They do have some rather thick stems for their size. I did top a few of the larger ones a couple weeks ago.
Worst comes to worse, they have a jump start on next year. I am overwintering all my Chinese varieties.