when you start with watercolors, A lot of beginners usually get confused with Hot Pressed and Cold Pressed. My personal preference is cold-pressed because it has a textured surface and provides a nice detail when you dry brush it. However, I use cold-pressed to do rainy scenes/wet scenes it gives a really nice smooth transition.
Hot Press Blending:
In the hot press, you can see the edges are textured and give and sparkly impressions of waters.
Cold Press Blending:
In the cold press, you can see the edges are smoother and give smoother transition impressions of waters.
If you have any other questions, comment below.