I'm guessing they'd feel a little bit like blue Alps? Which are indeed amazing so that'd make sense xD .
I've come to find that Blue Alps are super smooth because of the slider material. So one could possibly make ghetto Blue Alps with a Green/Orange/Brown/ slider and a click leaf
I've tried it with the Orange Alps casing/slider and White Alps click leaf, it's much better than stock White Alps in my experience, even lighter.
I'm quite sure it's not as simple as that, but the older the components you have in your switch, the better it will probably turn out to be, yes .
I'm pretty sure that the smoothness is due to the slider material but I may be wrong. When I tried clicky Orange Alps, they legitimately sounded (and felt) much better than White Alps. Comparing the sound to that of genuine Blue Alps results in a very similar sound overall. Here's a quick sound comparison video that I threw together comparing the clicky Orange Alps to White Alps (I apologize for the low video quality):
I'm not guaranteeing that clicky Orange Alps are identical to Blue Alps, but they certainly seem like the next best thing. I must also note that the Orange Alps in the video are quite old due to the lack of Alps logo on the casing and the long grey switchplate, so yeah, results may vary with this mod (depending on the age of the switches used).
Don't forget that the cases of those two keyboards are different. The sliders are just one of many things that changed between first and second-gen Alps, too.
Yeah, to be fair, I should have installed the switches in the same board. But we all know how time-consuming Alps are to desolder, and the case construction between the two boards is very comparable. I did use the same exact keycaps with the same profile though. Sound acoustics between the two are not too different other than the Apple (keyboard w/ Orange Alps) being extremely pingy. However, I will update the video soon with a proper comparison between the two switches using the same board.
As for the contrast between the first and second gen, yes there are many differences. Most likely the shorter switchplates make switches stiffer, which would make sense as Salmon Alps are heavier than Orange Alps, White Alps are heavier than Blue Alps, Yellow Alps are heavier than Green Alps etc.
So I'm assuming that the differences involve slider material, spring material, switchplate type, and (possibly) thickness/material of tactile and click leafs?