Both have 3/4 inch pip burners. The older one I used a portable band saw and cut slots every 1/2 inch. The newer one I used a sawzall and cut slots every 1/2 inch. The temp range of the older one is 200-510,Fahrenheit, the new one's range is 225-610 Fahrenheit. The older cooker uses a 25 lb high pressure regulator with a needle valve. The newer one uses a 10 lb adjustable regulator. so far both are cooking great.
Yes I saved the best for last..............