Clipless should be easier to disengage from than toeclips. With toeclips you should be tightening up the straps to keep your foot firmly attached for pedalling, but for city/commuting you'd likely have them looser so you can free your foot without touching the straps.Toeclips usually involve more of a pulling action to free your foot than a twist - I'd consider them slower than clipless.
Clipless clips are still a type of toe clip. You literally clip your toes into the pedals. Worst term ever.
Many years ago, when I was still using clipless I lost control on a patch of gravel. Momentum had my body rotating away from my bike such that one foot unclipped easily, but the other was rotating the wrong way to unclip, and I ended up twisting my knee pretty good.
It's a stupid name, but you do not clip your toes into the pedals at all. The clip attaches to a cleat at the bottom of your shoe which will be typically positioned at the ball of your foot or mid-sole - not your toes.
I use SPD (i.e. MTB two-bolt cleats) on my road bike and the worst problem I had with clipless was when one bolt had loosened and then fallen out during a ride. I thought that my right foot had a lot of float and when I stopped to examine it, I couldn't get my shoe released at all as it was attached with just one bolt and thus could rotate. I ended up undoing the shoe to get my foot free and after looking to see what the problem was, I decided to ride the rest of the way home (10 miles or so away) and fix it there.
Luckily, I unclip with my left foot (UK, so we're on the left side of the road) so I was fine until I got home and had to take my shoe off again to fully dismount. It's worth checking SPDs for a loose bolt from time to time.
