About 15 years ago, on several-plus occasions, 'spoke with members of the Illinois LST society and some men who brought LST-325 home from Europe to become a museum ship.
"Biggest" difference" in old notebook on the subject is:
"...commonly the RN LSTs did not have 40mm mounts (especially twins) or SG radar. The USN kept those for themselves."
"LSTs in the Pacific carried more and heavier guns. Whatever we could get our hands on."
"Sometimes (Government Issue) furniture and cookware was not available so some shipyards had people who bought pots and silverware and chairs and curtains and hand tools from local department and hardware stores."
With that last thought in mind, possibly some RN-to-be ships did not have those last things "furnished under Lend-Lease"?
This is a really important and exciting 1/350 kit subject...!
(PS, Father's artillery battery went to Utah Beach aboard USS LST-75)
Laid down, 30 January 1943, at Jeffersonville Boat & Machine Co., Jeffersonville, IN.
Launched, 7 April 1943
Commissioned USS LST-75, 21 June 1943, LT. John F. Mundy Jr., USNR, in command
During World War II, USS LST-75 was assigned to the Europe-Africa-Middle East Theater