theres a fair bit of difference between cabinet making and carpentry as opposed to joinery and carpentry.
joinery and cabinet making are similar, cabinet making involves use of whiteboard/mdf and occasionally timber, where as joinery (ie, stairs, windows, doors) mostly revolves around timber only, with the occasional mdf stair etc. im sure you'll know this anyways.
when i started my joinery apprenticeship i got told that its a good base to have if i wanted to get into carpentry afterwards because of the skills and knowledge you gain in the trade, but im unsure how much knowledge would be usefull as a cabinet maker going into a carpentry job.
the good thing with cabinet making as opposed to joinery and carpentry is the use of machines you will have, CNC machines, overhead routers, etc. plus the cash is awesome if its commercial work.