Dear yuvanraj;

Studying in an IPTS (in general) involves a lot of money compared to an IPTA; especially when it comes to a course like Architecture. In this course, you will also generally be spending quite a lot of money on your materials, medias, & stationary as such (just like in an Art & Design course). So if money is an issue, then you may like to rule out the IPTS. However, if money is not an issue, then feel free to pursue this course in a private institution like Taylors University, Limkokwing University of Creative Technology (also known as LUCT), UCSI (University), and Alfa College (formerly known as Aliff College).

However, just keep in mind that Taylors University no longer offers a Diploma in Architecture anymore. (You will go for their Part 1 Degree in Architecture instead.)

LUCT (Limkokwing University) offers a Diploma, Part 1 Degree, as well as the Part 2 Degree in Architecture as well. (None of the other IPTS offers the Part 2 Degree at the present, except for this particular private institution LUCT.)

Feel free to check out the respective official websites of these private institutions (IPTS) to get more information about their respective Architecture programs.

Next would be the issue of accreditation (for this country of Malaysia); where none of the private institutions (IPTS) have the accreditation status currently. (This could be an issue if you would like to practice Architecture in this country after completing the course, however, it will not be an issue if you practice this profession in oversea countries.)

The LAM - PAM accreditation does not apply to the Diploma programs.

The private institutions offers their respective foundation program for O-Level/SPM level students to gain entry into their respective architecture degree program without A-Levels/STPM level.

But all IPTA does not offer foundation programs (except UIAM/IIUM); where the STPM is required of Malaysian students, and the A-Levels from international students.
The IPTA (public government universities) are much more affordable compared to the IPTS, and both Part 1 & Part 2 Degrees are accredited by LAM - PAM. However, the big disadvantage is that the competition is very fierce, where it is very challenging to secure a place. (There are many students competing for a place; it can be as many as 3000+ students competing for just 30 places in just one intake alone, and there is only just one intake per-year compared to the multiple-intakes per-year of the private institutions.)

Finally, once you are accepted into an IPTA, you are also expected to perform consistently up to the mark (it is not going to be easy); where failing to perform up to the mark in a consistent manner will get you kicked out, and be replaced by another (more eligible) student. (The Society matters over an Individual in an IPTA.)

Just be informed that you will also need to stay out (away from home) if you are studying in an IPTA; this is because all of the IPTA campuses (except UM & UTM KL) are all located away from the main city, and situated in the more rural regions & suburbs; far away & isolated. In contrast, all of the private institutions (except LUCT) are located in the main city; close to your home. (Ultimately, it primarily depends on where you are staying as well, or the location of your home.) The IPTA also require all 1st year students to stay in the hostel of the campus, and use the public transportation system; not being allowed to use your own private vehicle (in the 1st year).

But, you will also "most likely" need to stay in the hostel too, at (Limkokwing University Cyberjaya) if you would like to study there; however, the big difference is that the new hostel building at LUCT is totally brand new right now, and the new rooms are also big, fully furnished, + with attached personal bathroom (as such, you do not have to share your room & toilet with anyone). (However, you will have to pay quite a significant amount for the good accommodation & services at LUCT...)

Similarly at Taylors University (if you ever have to stay in the hostel), everything is brand new & clean as well. The accommodation is great with options for single en-suite rooms with attached personal bathrooms (with no sharing with anyone at all); but as usual, you will have to pay for the good quality accommodation too. (In short, you will have to pay "quite a significant amount" for the otherwise much "better" accommodation facilities & services available at these private institutions; including SEGI University's new campus as well.) Taylors new "commercial building" offers all of the necessaries ever needed; which made it so convenient for the students staying in the hostel or even the new Hotel... (But things can be rather expensive in there...)

[These are primarily the pros & cons of studying in an IPTA or IPTS.]
Other basic information concerning Architecture can be found at the beginning of this thread.

Regards.