RB20 and RB25 LOWER Harness Differences?

[tight240]

Im currently swaping my 20 for a 25 s2, just received my s2 upper harness and was wondering if you can use the 20 lower harness??? I looked over the writeups and everything i did to my 20 lower harness is the same for the 25 lower harness,all plugs look identical, except the 25 trans speedo sensor being different from the 20's but everything else seem the same (air regulator plug,knock sensor plug, etc.). Im doing the swap in a S13, just wondering if anybody else have a take on this.