Locales in AIX

Currently we have the following locales installed on two of our servers
SERVER-1
$ locale -a
C
POSIX
en_US
en_US.8859-15
en_US.ISO8859-1
EN_US
EN_US.UTF-8
ZH_CN
ZH_CN.UTF-8
HI_IN
HI_IN.UTF-8
ko_KR
ko_KR.IBM-eucKR
zh_TW
zh_TW.IBM-eucTW

SERVER-2
C
POSIX
en_US
en_US.8859-15
en_US.ISO8859-1

Since on server-2, I did not have UTF-8 locales installed, I was under the impression that on this server I'll not be able to run iconv to convert files from ISO8859 to UTF-8. But on both the servers I was able to convert the files from ISO8859-1 to UTF-8 using "iconv -f ISO8859-1 -t UTF-8 filename".
Technically both the servers should be in sync but somehow they are not. What is the downside of not having UTF-8 locales installed on SERVER-2? Appreciate any info on this.

Thanks,
voorkey