Hi Rubis...
Being from technical background, i can only say Oracle and SAP are like CRM...
Basically a SAP HR or an Oracle HR course would help you to work on the HR software that many big organizations use... But not all...
Many big brands who have considerablly manageable employees, even today use traditional excel and access (as database) to come to conclusion.
Another thing, as i said before SAP and Oracle are just CRM or database/info handling mechanism, it won't give you core HR knowledge... it would teach you how to do (say for eg) a recruitment task easily by maintaining a data that gets updated automatically...
But it won't teach you the core process of recruitment... (hope you were able to guage the difference)
Abt which course is better, honestly i've never enquired.... reason being, in order to understand a shortcut or an easy way, firstly we must know the longcut or a difficult way... I am trying my hands on excel and managing my data on it (also coz we have under 50 staff).... So i can't tell you which one is better...
But I would recommend to first understand the core HR process and practice, and how it works and then only if reqd you can learn the shortcuts of the process... It may so happen that the investment u'd make for such course, you may not be able to put it to use... unless you are wid a brand or big organization with large no of employees, it might not be of help...
one of my frnd's working at a brnd, its in IT industry, HQ at Mumbai but have offices at many places, employee strength of 1000+ or still higher range... and yet she uses excel to make trackers....
Just to give you an idea abt how fruitful or futile it would be to undergo SAP/Oracle at the beginning of ur career... you can always do so in the later part when you think it bcms essential...
(Again that was my suggestion, you're free to seek advice from other professionals here who have better experience... :-) )
Wish you luck :-)