...bites that is. The less terminal tackle you can use the better. In certain cases a snap swivel, clip, or other terminal tackle may not deter any bites; but in most cases it will!
When possible tie your leader on with a line to line knot and tie directly to the lure. Leave the snaps and swivels out for maximum success.
If the two jigs in the picture are swimming side by side in the water; my money is on the jig with less terminal tackle to get the bite first!