If you're selecting only betw these 2, I'll strongly recommend NUH. Not that NUH is optimal, but I think there are many areas which KKH can do better in.
1) Safety. KKH prescribes med at start of stim, and your next and possibly only scan is around day 8. If you're someone who over-responds to medicine like me, not good at all because I already had 40+ follicles fr 87.5IU or 112.5IU of med. For first timers, usually they'll prescribe at abt 150IU. NUH's first scan is abt day 4, so adjustment could be made accordingly, depending on how you respond to the med. On the other hand, if you don't respond well, you might end up wasting money. Case in point: I always thought my friend wasted a lot of money for stim, because they waited for 8 days for first scan before realizing that the med didn't work well for her. She ended up having to stim for an additional 7 days. That would have set her back hundreds of dollars as we all know the stim med is not cheap.
2) Support given after BFP. This one both hospitals seem to be on extreme ends. NUH gives progesterone in excess, from the recent posts you can read for yourself that KKH is not as liberal with that. I have another friend who had a miscarriage her first transfer. Her second transfer BFP again, she went to see a private gynae on top of KKH, and private gynae did a blood test and found out her progesterone levels were too low to support pregnancy. So she was getting support from private gynae instead of KKH. And she's still suspecting till today she lost her first one due to the same reason - lack of progesterone.
3) Ownership of scans and prescription - in NUH, scan is done by doc, on the spot will give you a preliminary prescription and actions to be taken (still need to wait for BT results to make sure your estradiol levels are good). The doc will look out for things during the scan to make the decision. In KKH, scans are not done by the doc. Sonographer scans, records down the number and measurements, then pass the document to "a team of docs" who makes the decision.
4) Mentioned by someone else, waiting time is a factor. Related to point 3. In NUH, doc scans, decides and talk to you, then you can go meet the nurse to collect med. In KKH, there's at least one more station at the start which you have to wait (sonographer, then doc).
5) Update of your embryos. To me it's an added service that NUH lab called me every morning to update me on the fertilization and growth of all my embryos. Even on New Year's Day (1 Jan). My friend with KKH, had no idea if her embryos made it, went for her transfer, waited for close to 4 hours in the hospital in the hospital gown, before her doc told her none of her embryos made it.
