I have a confession to make.
I have never used Safari other than on my iPhone. Until now, that is. In fact, I am typing this in Safari 4 right now. My first impression was mediocre. I got this page that took ages to load my top visited sites (although I suspect it gave me a bunch of random sites instead because I haven’t actually used the browser before). Just now I tried adding an image below my last sentence, but Safari doesn’t seem to like the ‘Insert into Post’ button. I don’t know why. Anyway, I’m manually adding it now, but I’m not very pleased.

My next impression was that it seemed so spacious. I don’t know if it’s the feel of the new interface, but it seemed much more open than Chrome. The fact that the font size in the top bar is smaller than it is with Google Chrome may contribute to the space seeming larger, but upon comparison we can see that with the bookmark bar expanded in both browsers, Safari and Chrome’s toolbars take up exactly the same amount of space (see ‘A’ below). With Google Chrome’s bookmark bar closed using Ctrl+B, Chrome’s toolbar becomes much thinner (see ‘B’ below). I’m not sure how to close Safari’s bookmark bar yet, if it’s even possible.

(Hey, the ‘Insert into Post’ button worked that time!)
Speed-wise, I’ve read that Safari 4 is meant to be quite fast. I’m not seeing it. Google Chrome, so far, definitely beats Safari in speed here. I’ll keep using it for a while to see how I like it overall, though I doubt I will switch over to Safari permanently. So far, Google Chrome is still my browser of choice.