Default [Q] newbs root and rom question

hey im new to the whole rooting and roms I just bought a new Samsung galaxy s3 mini and I cant wait to get it but I was wondering. it comes with jellybean 4.2.2 and I was thinking about trying out the new pac man rom wich is kitkat 4.4.2 would I be able to use this rom or would I need to get a older version of it thanks again guys any other tips and tricks would be greatly appreciated!