Thinbars:
Cheaper
Small sizes available
Fragile until 5-6''
Thin bars
Widebar:
Expensive
Small sizes may be coming back into hobby from cambodia
Two regional variant, Siamese (no young available) and Cambodian
Probably grows larger
Thick, wide bars, middle bar curves backwards
Darker, more reddish color.
Occasionally confused with Malaysian AKA 3 bar Indo Datnoid
That's my understanding, experts feel free to correct