difference of standalone bi publisher versions 10.1.3.4.1 to 10.1.3.4.2

Hi All,
We have a difference of Standalone BI PUBLISHER version 10.1.3.4.1 to 10.1.3.4.2.
our clients are having standalone BIP version of 10.1.3.4.1 but we are having 10.1.3.4.2.

My doubt is if i develop the reports in 10.1.3.4.2 will it be compatible with 10.1.3.4.1 as our client having this lower version, or else i have to uninstall 10.1.3.4.2 and install 10.1.3.4.1.
uninstalling 10.1.3.4.2 and installing 10.1.3.4.1 i can do but as we have less time to develop the report, we don't want to waste the time in installing this version.

If anyone has done any experiment with such version compatibility or anyone has any suggestion, please reply.

Thanks in Advance.