The click in blues is caused by the separation (and the reverse motion on the release) of the white slider piece against the blue stem when it 'snaps' past the metal leaf (the actuation point) - and thus, assuming the same striking force while typing (at least during the acclimatization phase) - a stiffer spring would mean a larger separation distance (as the blue stem would be held steadier by the stiff spring). That is pretty much the reason why greens have a more solid click than blues (they use the same stem and sliders) - and yes, stiffer springs in blues does give a more solid click, but only to a point. I would prefer clear springs in blues generally as it brings out most of the click, and very little of the clack since the high bottom out force at the later half of the actuation actually helps with not bottoming out.
As for the topic of ergoclears - photoelectric's observation is pretty much on point, but for different reasons. I have used 55g, 62g, and 65g ergoclears for quite a while. The stiffer springs are quieter, mostly because it is easier not to bottom out. And even if you do - the heavier springs means you do not bottom out as hard. Imagine that your finger strike is rated at about 75g - and keeping this constant, it would mean that you hit the bottom the hardest for 55g, less for 62g and even less at 65g springs. This doesn't even take the tactile bump into account, which makes a difference - it is much harder to 'ride' the actuation point for lighter springs - making it more of a jolt motion once actuation is passed for, say 55g springs.
Stock clears on the other hand, are naturally much quieter than ergoclears - for the same reason stated above. The tactile bump doesn't really contribute much noise to the typing, but the approximate 100cN bottom out requirement helps with the clacking from bottoming out.
@OP - if you want clicky, do what a few others have already suggested and get a buckling spring board, or even complicated blue alps. A much better experience imho.
