I had the experience of driving both in military....M38A1 has independent suspension... it flys cross country specially in desert...it is also used to house a anti tank gun on it...i think the pics posted are of CJ7 as the M38 has lot of difference in shape.... its lesser in height.....
u can also see some auction ones on the road having a cut in the wind screen that is to place the barrel of anti tank gun....
these M38 mounted guns played a major role in 1965 war....and if there are some still available with guns it is favourite of all even Army has now defenders as well...
a real se*y thing......thing i liked the most was the starter push button located near brake pedals....so one has to start it with foot......