Technically there's almost no difference, the EWS is made from flat plate and electrically butt welded 1010 mat'l, the DOM is 1020 mat'l and cld draw over a mandrel and seemless, the carbon content is in the same range on both.
They both have 80,000 PSI tensil strenth and 70,000 PSI yeild strenth.
The EWS is cheaper to produce so it sells for less. They are both rolled on ther OD for consistent dia.
I would buy the DOM for the price difference and be sure to get .134 wall because there's up to .007 tolerance on the wall thickness and it could fail NHRA's .120 wall specification.
Zip.