Hello arcanum00

I'm hesitating to go for Kaplan UCD is because I've been told by friends that Uni SIM is better recognized hence i shouldn't waste time and money to get a degree with Kaplan UCD so yeah...
Yep! I know that UCD isn’t that bad. It’s ranked 139 in the world.
I’m unable to enter Manchester offered by SIM as I don’t have any A level or poly diploma. I was told that with Kaplan’s diploma, I can only enter RMIT (ranked 291) or University at Buffalo (ranked 302). Judging by the rank, I doubt it’s a good choice. So I’m left with either UCD through Kaplan or Uni SIM as my current choices. Thank you for your help
UniSIM is not ranked, so is SMU. Surely, many companies' HR managers would not think that SMU is no good even when it's not ranked in many ranking tables. So take don't rely too much on ranking.
Whether UCD is better than UniSIM in terms of recognition, or vice versa, may be controversial. Suppose, like your friends said, UniSIM is better than UCD. Then getting a master's after the UCD programme from a university as well-regarded as UniSIM (you may want to consult your friends again which schools are those) may put you to a better advantage than with just an undergraduate Honour degree within the same timeframe. That's provided the master's programmes would accept the UCD degree as entry requirement. Usually, these universities would. But I would play safe, and email/call them to confirm.
Notice that the constraint above is only time, budget is not considered. That is, if budget is concerned, you may also want to take into consideration of your budget and the return of investment if you are considering taking a master's. I think it may be worthwhile, given many in the job market are equipped with an undergraduate degree. Well, I may be wrong.
In summary,
Your case:
Time: UCD > UniSIM.
Reputation: UniSIM > UCD (according to your friends)
Dilemma...
Suggestion:
Time: UCD + master's > UniSIM
Reputation: UCD + master's > UniSIM
(given the master's is at a higher academic level than undergraduate degrees, and the university accepting the UCD degree and offering the master's is at least as recognised as UniSIM)
Budget: UniSIM > UCD + master's
(justifiable if the ROI is greater with a master's)
Take note of your cashflows within these four years.
Caveat: Verify if any university at least as recognised as UniSIM (as your friends have claimed) accepts UCD degree which is 1.5 year. Verify if the ROI is indeed greater with a master's. I would think so for both points, but I may be wrong. So, verify them.
My approach in choosing a degree programme was unlike what I have suggested to you here as we have different objectives and different academic background altogether. The constraints I have were also different. That is, I might have chosen a longer programme in your case, and/or I might have choosen other different programme(s) altogether.
A side note, you can look for sponsorships from your company or other organisations.
Just some suggestions.
Hope it helps.
Cheers!