I visited The Infiniti also, finishing is not bad, huge balcony, haha... but for those units facing AYE, noise level is very high, the expressway is just less than 10m away! However, with the windows shut, the noise can be reduced by a lot. I tested it myself
As for Waterfront Waves, those units facing the bedok park is actually quite a distance away from the PIE, atleast 80m away... and the noises from expressway is blocked and absorped by many "tall" trees... therefore, noise level is actually very low with the windows open... I went up to the HDB beside the plot and "hear" it myself... So, with the windows closed, we basically hear nothing.
For those with a low budget like me (~600psf), and want N-S unblock facing yet near to nature, i think unit facing the bedok park is the best buy.