可以在轨道上使用不同版本的ruby出现问题吗？

Now on my localhost I'm starting developing first simple web service using ruby 1.9.2 and rails 3.2.1 versions . But my hoster support only 2.3.14 version of ruby (becouse he is using Cpanel). Will a have problem with this? how to prevent them? Moreover, what difference is between 3.2.1 and 2.3.14, I meen gems etc? O it is better to start now developing using 2.3.14? what gems would not work in 2.3.14? will haml, sass, captcha and other gems work in old version?Now on my localhost I'm starting developing fir