The metasprints/trifactor ones are fun but usually quite prone to rather huge discounts in distance, eg 10km it could be minus as large as 1km for the one held at Sentosa. Not sure about ECP. Could be space constraints @ Sentosa. This one can fight with Skechers 2023 10K, in which people claim it's more like 9.1k.
Also, dont have much expectation for the vibes as being a race other than at the organized start/finished point area......... more like a parkrun. ie You can get the same effect from a parkrun.
Probably you can DIY the effect with just going to ECP or BEG and gunning 2 rounds for 10KM, lagi more accurate distance. Ender said it is super zhun one, as they do use measuring wheel.
Other than SCSM and track, this one confirm zhun and can claim true PB.
I think if you ran Skechers 10K, your 10k can claim 35 min liao.

edit correction, nope....3:45 pace for ~ 9.1k is like 34min flat.
Much better would be T100, but then 2026 they only started to do Youth distance, iirc only 400m swim and 3k run. They also started to do Olympic distance tri this year, 1.5k swim 40k bike and 10k run.
Also, it is done at Marina reservoir so no currents of any sort one, so relatively safe.
Too bad you or sph777 no bike. If not can do duathlon, in which T100 also "Gold" standard. Distance for the run also discount but just a little, not as bad.